Cita APA (7a ed.)

Heyne, E. G. (1987). Wheat and wheat improvement (2nd. ed.). Soil Science Society of America ; American Society of Agronomy ; Crop Science Society of America.

Cita Chicago Style (17a ed.)

Heyne, E. G. Wheat and Wheat Improvement. 2nd. ed. Madison: Soil Science Society of America ; American Society of Agronomy ; Crop Science Society of America, 1987.

Cita MLA (8a ed.)

Heyne, E. G. Wheat and Wheat Improvement. 2nd. ed. Soil Science Society of America ; American Society of Agronomy ; Crop Science Society of America, 1987.