Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.