Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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