APA-referens (7:e uppl.)

WARE, G. W., & MCCOLLUM, J. (1968). Producing vegetable crops. The Interstate Printers and Publishers.

Chicago-referens (17:e uppl.)

WARE, George W., och J.P MCCOLLUM. Producing Vegetable Crops. Illinois: The Interstate Printers and Publishers, 1968.

MLA-referens (9:e uppl.)

WARE, George W., och J.P MCCOLLUM. Producing Vegetable Crops. The Interstate Printers and Publishers, 1968.