Gaya APA

Phillisps, R., Phillps, S, H. (1984). No-Tillage Agriculture, principles and practices . New York: Van Nostrrand Reinhold Company.

Gaya MLA

Phillisps, Ronald., Phillps, Shirley, H.. "No-Tillage Agriculture, principles and practices". New York: Van Nostrrand Reinhold Company, 1984. Text.