APA (7th ed.) Citation

Spencer, D. D. (1995). Key dates in number theory history: From 10,529 B.C. to the present. Camelot Pub..

Chicago Style (17th ed.) Citation

Spencer, Donald D. Key Dates in Number Theory History: From 10,529 B.C. to the Present. Ormond Beach, Fla.: Camelot Pub., 1995.

MLA (9th ed.) Citation

Spencer, Donald D. Key Dates in Number Theory History: From 10,529 B.C. to the Present. Camelot Pub., 1995.