Παραπομπή σε μορφή APA (7η εκδ.)

Carlson, J. E., Papendick, R. I., & Michalson, E. L. (1999). Conservation farming in the United States: The methods and accomplishments of the STEEP program. CRC Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Carlson, John E., Robert I. Papendick, και Edgar L. Michalson. Conservation Farming in the United States: The Methods and Accomplishments of the STEEP Program. Boca Raton: CRC Press, 1999.

Παραπομπή σε μορφή MLA (8th εκδ.)

Carlson, John E., et al. Conservation Farming in the United States: The Methods and Accomplishments of the STEEP Program. CRC Press, 1999.