APA ציטוט

Sprague, G. F. (1976). Corn and corn improvement (2.). American Society of agronomy, Inc.

Chicago Edition Citation

Sprague, G F. Corn and Corn Improvement. 2. Madison: American Society of agronomy, Inc, 1976.

ציטוט MLA

Sprague, G F. Corn and Corn Improvement. 2. American Society of agronomy, Inc, 1976.