Sources compiling or critiquing original works. Examples of secondary source include literary criticism, biographies, encyclopedia articles, and journal articles critiquing the work of others.

analyses or restatements of primary sources (records of events as they are first described or original data) by other authors or researchers. Secondary sources might take the form of research reports, news articles, biographies, documentaries or history books) used to gain an understanding of a topic. Primary sources might be poems, raw tabulations of census data, video recordings or other records of observation. The use of secondary sources should be distinguished from secondary analysis of other researchers' original data (a primary source).

Materials contianing the research findings of someone who lived after the event being studied. A secondary source often relies on primary (as well as other secondary) sources.

Secondary sources in traditional legal research are either commentaries on the primary sources of law, or finding tools used to locate the primary sources of law. Texts, periodical articles, and encyclopedias are examples of commentaries. Digests, citators and indices are examples of finding tools.

Works that are not original manuscripts, contemporary records or documents associated with an event, but which analyze, evaluate, interpret or criticize primary sources.

Interpretation of and commentary on primary sources.

Studies written about a period, place, event, person or people (etc.). Generally based on Primary Sources, as well as other Secondary Sources. Secondary Sources can take the form of books, journal articles, theses, documentaries etc.

material published about primary sources (collections, reviews, popularizations, monographs, etc.), and tools which point the user to primary sources (abstracts, indexes, bibliographies). Secondary sources are created by someone who was either not present when an event occurred or removed from it in time.

Material or documents that interpret events or topics, such as history books. See also "Primary Sources."

Secondary sources are materials that provide interpretations, analyses, explanations, critiques, restatements and descriptions of primary sources.

Records such as history books and articles that are based on primary sources but are not themselves first-hand accounts.

For librarians, bibliographic sources in which books, articles, and other primary sources are listed. In other fields of inquiry, secondary sources refer to books and articles which are written using historical record material as sources.

secondary source contains commentary on or discussion about a primary source. The most important feature of secondary sources is that they offer an interpretation of information gathered from primary sources.

Information sources created by someone either not present when the event took place, or removed by time from the event. Examples of secondary sources include journal articles, histories, and encyclopedias. (See also Primary sources).

Writings and discussions about the primary sources, such as works of history or criticism found in books and journals

sources that record the words of someone who didn't actually witness or participate in an event, but rather investigated the primary sources. Examples of secondary sources include books and journal articles.

Sources that are often based on primary sources, and include reviews, criticism, editorials, and analysis. Most journal articles are secondary sources which provide analysis, interpretation, or evaluation.