Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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