Cita APA (7a ed.)

Gibbon, D., Pain, A., & Payne, W. J. A. (1985). Crops of the drier regions of the tropics. Longman.

Cita Chicago Style (17a ed.)

Gibbon, David, Adam Pain, y W. J. A. Payne. Crops of the Drier Regions of the Tropics. London: Longman, 1985.

Cita MLA (8a ed.)

Gibbon, David, et al. Crops of the Drier Regions of the Tropics. Longman, 1985.