Cita APA (7a ed.)

Jeffrey, R. C. (1981). Formal logic: : its scope and limits (2nd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Jeffrey, Richard C. Formal Logic: : Its Scope and Limits. 2nd ed. New York [etc.]: McGraw-Hill, 1981.

Cita MLA (9a ed.)

Jeffrey, Richard C. Formal Logic: : Its Scope and Limits. 2nd ed. McGraw-Hill, 1981.