Tertiary sources consist of information which is a collection of primary and secondary sources. Tertiary sources are good starting points for research projects because they often distill large amounts of information.
Even more difficult in discerning the difference between a primary and secondary source is reviewing tertiary sources. Some writers don't make the distinction between tertiary and secondary because both types of materials do not represent original works (primary sources). However, for the purposes of reviewing the literature, it is important to understand how tertiary sources can contribute to your overall search for relevant information for your paper.
Reviewing tertiary source material can be of value in improving your overall research paper because they:
Examples of tertiary sources you could review as part of your overall study include:
* Bibliographies (also considered secondary);
* Dictionaries and Encyclopedias (also considered secondary);
* Fact books;
* Indexes, databases, search engines, and bibliographies used to locate primary and secondary sources;
* Statistical compendiums;
* Textbooks and course readers (may also be secondary).
Tertiary sources also include user-contributed online resources such as Wikipedia.