Cita APA

Callaway, M. B., & Francis, C. A. (1993). Crop improvement for sustainable agriculture. Lincoln: University of Nebraska Press.

Citación estilo Chicago

Callaway, M. Brett, y Charles A. Francis. Crop Improvement for Sustainable Agriculture. Lincoln: University of Nebraska Press, 1993.

Cita MLA

Callaway, M. Brett, y Charles A. Francis. Crop Improvement for Sustainable Agriculture. Lincoln: University of Nebraska Press, 1993.