APA (7th ed.) Citation

Williams, C. N., Uzo, J. O., & Peregrine, W. T. H. (1991). Vegetable production in the tropics. Longman Scientific and Technical.

Chicago Style (17th ed.) Citation

Williams, C. N., J. O. Uzo, and W. T. H. Peregrine. Vegetable Production in the Tropics. Essex, England: Longman Scientific and Technical, 1991.

MLA (8th ed.) Citation

Williams, C. N., et al. Vegetable Production in the Tropics. Longman Scientific and Technical, 1991.