APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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