Dalton, Margaret Steig; Charnigo, Laurie (September 2004). "Historians and Their Information Sources". College & Research Libraries: 416 n.3. Archived from the original on 10 May 2021. Retrieved 20 May 2020., citing U.S. Dept. of Labor, Bureau of Labor Statistics (2003), Occupational Outlook Handbook; Lorenz, Chris (2001). "History: Theories and Methods". In Neil J. Smelser; Paul B. Bates (eds.). International Encyclopedia of Social and Behavioral Sciences. Vol. 10. Amsterdam: Elsevier. p. 6871.
"Glossary, Using Information Resources". Archived from the original on 28 August 2008. ("Tertiary Source" is defined as "reference material that synthesizes work already reported in primary or secondary sources")
uchicago.edu
magazine.uchicago.edu
Kott, Ruth E. "The origins of writing". The University of Chicago Magazine. Archived from the original on 23 January 2015. Retrieved 16 December 2013.
Dalton, Margaret Steig; Charnigo, Laurie (September 2004). "Historians and Their Information Sources". College & Research Libraries: 416 n.3. Archived from the original on 10 May 2021. Retrieved 20 May 2020., citing U.S. Dept. of Labor, Bureau of Labor Statistics (2003), Occupational Outlook Handbook; Lorenz, Chris (2001). "History: Theories and Methods". In Neil J. Smelser; Paul B. Bates (eds.). International Encyclopedia of Social and Behavioral Sciences. Vol. 10. Amsterdam: Elsevier. p. 6871.
"Glossary, Using Information Resources". Archived from the original on 28 August 2008. ("Tertiary Source" is defined as "reference material that synthesizes work already reported in primary or secondary sources")