Cita APA (7a ed.)

Fehr, W. R., & Hadley, H. H. (1980). Hybridization of crop plant. American Society of Agronomy and Crop Science Society of America.

Cita Chicago Style (17a ed.)

Fehr, Walter R., y Henry H. Hadley. Hybridization of Crop Plant. Madison, WI: American Society of Agronomy and Crop Science Society of America, 1980.

Cita MLA (8a ed.)

Fehr, Walter R., y Henry H. Hadley. Hybridization of Crop Plant. American Society of Agronomy and Crop Science Society of America, 1980.