Cita APA (7a ed.)

Sprague, G., & Dudley, J. (1988). Corn and corn improvement (3rd edition.). ASA : SSSA : CSSA.

Cita Chicago Style (17a ed.)

Sprague, G.F, y J.W Dudley. Corn and Corn Improvement. 3rd edition. Madison, Wisconsin: ASA : SSSA : CSSA, 1988.

Cita MLA (8a ed.)

Sprague, G.F, y J.W Dudley. Corn and Corn Improvement. 3rd edition. ASA : SSSA : CSSA, 1988.