Cita APA (7a ed.)

Barker, S. F. (1980). The elements of logic (3rd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Barker, Stephen F. The Elements of Logic. 3rd ed. New York: McGraw-Hill, 1980.

Cita MLA (9a ed.)

Barker, Stephen F. The Elements of Logic. 3rd ed. McGraw-Hill, 1980.