Cita APA (7th ed.)

Barker, S. F. (1989). The elements of logic (5th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Barker, Stephen F. The Elements of Logic. 5th ed. New York: McGraw-Hill, 1989.

Cita MLA (9th ed.)

Barker, Stephen F. The Elements of Logic. 5th ed. McGraw-Hill, 1989.