APA (7th ed.) Citation

Williams, C. N., Chew, W. Y., & Rajaratnam, J. H. (1980). Tree and field crops of the wetter regions of the tropics. Longman.

Chicago Style (17th ed.) Citation

Williams, C. N., W. Y. Chew, and J. H. Rajaratnam. Tree and Field Crops of the Wetter Regions of the Tropics. London: Longman, 1980.

MLA (9th ed.) Citation

Williams, C. N., et al. Tree and Field Crops of the Wetter Regions of the Tropics. Longman, 1980.