PRIMARY
(Original source material)

TERTIARY
(Summaries or condensed versions of primary and secondary source material)

Archival Material
Artifacts
Autobiographies (books)
Correspondence
Diaries
Government Documents
Interview
Letters
Magazine
Manuscript
Memoirs (books)
Newspapers
Photographs
Works of art (music, painting, poetry, etc.)

Biography
Books
Book Reviews
Conference Proceedings
Dissertation
Editorial
Literary Criticism
Magazines articles
Textbooks
Treatise
Scholarly journal articles

Abstracts
Bibliography
Chronology
Dictionary
Directories
Encyclopedias
Guidebooks
Manuals
Indexes