Gaya APA

GEorge, I, H, J., Stakman, E. (1957). Principles of plant pathology . New York: New York: The Ronald; 1957.

Gaya MLA

GEorge, I., Harrar,, J.., Stakman, E.C. "Principles of plant pathology". New York: New York: The Ronald; 1957, 1957. Text.