APA
Caldwell B. E., Howell R. W., . (1973). Soybeans. Madison: American Society of Agronomy.
Chicago
Caldwell B E, Howell Robert W, . 1973. Soybeans. Madison: American Society of Agronomy.
Harvard
Caldwell B. E., Howell R. W., . (1973). Soybeans. Madison: American Society of Agronomy.
MLA
Caldwell B E, Howell Robert W, . Soybeans. Madison: American Society of Agronomy. 1973.