Cita APA (7a ed.)

Abbott, J. C., & Makeham, J. P. (1990). Agricultural economics and marketing in the tropics (2nd ed.). Longman Scientific & Technical.

Cita Chicago Style (17a ed.)

Abbott, John Cave, y J. P. Makeham. Agricultural Economics and Marketing in the Tropics. 2nd ed. Harlow: Longman Scientific & Technical, 1990.

Cita MLA (9a ed.)

Abbott, John Cave, y J. P. Makeham. Agricultural Economics and Marketing in the Tropics. 2nd ed. Longman Scientific & Technical, 1990.