Cita APA

Hay, R. K. M. (2006). The physiology of crop yield. Oxford: Blackwell Pub.

Chicago Style Citation

Hay, Robert K. M. The Physiology of Crop Yield. Oxford: Blackwell Pub, 2006.

Cita MLA

Hay, Robert K. M. The Physiology of Crop Yield. Oxford: Blackwell Pub, 2006.