APA-referens

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

Chicago-stil citat

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

MLA-referens

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