APA-referens (7:e uppl.)

JEFFREY, R. C. (1967). Formal logic: Its scope and limits. McGraw-Hill.

Chicago-referens (17:e uppl.)

JEFFREY, Richard C. Formal Logic: Its Scope and Limits. New York: McGraw-Hill, 1967.

MLA-referens (9:e uppl.)

JEFFREY, Richard C. Formal Logic: Its Scope and Limits. McGraw-Hill, 1967.