Gaya APA

Conservation farming in the United States : the methods and accomplishments of the STEEP program / edited by, Edgar L. Michalson, Robert I. Papendick, John E. Carlson. (1999). : Boca Raton : CRC Press..

Gaya MLA

Conservation farming in the United States : the methods and accomplishments of the STEEP program / edited by, Edgar L. Michalson, Robert I. Papendick, John E. Carlson. . : Boca Raton : CRC Press., 1999. Text.