Cita APA (7th ed.)

Cooley, J. C. (1942). A primer of formal logic. Macmillan.

Cita Chicago (17th ed.)

Cooley, John Cleveland. A Primer of Formal Logic. New York: Macmillan, 1942.

Cita MLA (9th ed.)

Cooley, John Cleveland. A Primer of Formal Logic. Macmillan, 1942.