APA-referens

Koch, W., Kranz, J., & Sahmutterer, H. (1977). Diseases, pests and weeds in tropical crops. Verlag paul Parey.

Chicago-stil citat

Koch, Werner, Jurgen Kranz, och Heinz Sahmutterer. Diseases, Pests and Weeds in Tropical Crops. Berlin: Verlag paul Parey, 1977.

MLA-referens

Koch, Werner, et al. Diseases, Pests and Weeds in Tropical Crops. Verlag paul Parey, 1977.