Cita APA (7a ed.)

Guthrie, J. A. (1965). Economics (3rd ed., [1st printing].). Irwin.

Cita Chicago Style (17a ed.)

Guthrie, John A. Economics. 3rd ed., [1st printing]. Homewood: Irwin, 1965.

Cita MLA (9a ed.)

Guthrie, John A. Economics. 3rd ed., [1st printing]. Irwin, 1965.