Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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