Cita APA (7th ed.)

Goodwin, J. W., & Drummond, H. E. (1982). Agricultural economics (2nd ed.). National Book Store.

Cita Chicago (17th ed.)

Goodwin, John W., i H. Evan Drummond. Agricultural Economics. 2nd ed. Manila: National Book Store, 1982.

Cita MLA (9th ed.)

Goodwin, John W., i H. Evan Drummond. Agricultural Economics. 2nd ed. National Book Store, 1982.