Dyfyniad APA

Williams,C N, Peregrine W T H, & Uzo,J O. (1991). Vegetable production in the tropics. Longman group UK limited.

Dyfyniad Arddull Chicago

Williams,C N, Peregrine W T H, and Uzo,J O. Vegetable Production in the Tropics. England: Longman group UK limited, 1991.

Dyfyniad MLA

Williams,C N, et al. Vegetable Production in the Tropics. Longman group UK limited, 1991.

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