Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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