APA (7th ed.) Citation

Cobley, L. S., & Steele, W. M. (1977). An introduction to the botany of tropical crops (3d ed.). Longman.

Chicago Style (17th ed.) Citation

Cobley, Leslie S., and W. M. Steele. An Introduction to the Botany of Tropical Crops. 3d ed. London ; New York: Longman, 1977.

MLA (9th ed.) Citation

Cobley, Leslie S., and W. M. Steele. An Introduction to the Botany of Tropical Crops. 3d ed. Longman, 1977.