Gaya APA

Sprague, G, F. (1977). Corn and Corn Improvement (Cet. 2). : American Society of Agronomy, Inc. (ASA).

Gaya MLA

Sprague, G., F. "Corn and Corn Improvement". Cet. 2 : American Society of Agronomy, Inc. (ASA), 1977. Text.