APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Gibbon, David P., and Adam Pain. Crops of the Drier Regions of the Tropics. London: Longman, 1985.

MLA (9th ed.) Citation

Gibbon, David P., and Adam Pain. Crops of the Drier Regions of the Tropics. Longman, 1985.