Cita APA (7a ed.)

Américan Society of Agronomy. Crop Science Society of América. (1969). Physiological aspects of crop yield: Procceding of a symposium held at the university of Nebraska, Lincoln, january 20-24. [editor no identificado].

Cita Chicago Style (17a ed.)

Américan Society of Agronomy. Crop Science Society of América. Physiological Aspects of Crop Yield: Procceding of a Symposium Held at the University of Nebraska, Lincoln, January 20-24. [Lugar de publicación no identificado]: [editor no identificado], 1969.

Cita MLA (8a ed.)

Américan Society of Agronomy. Crop Science Society of América. Physiological Aspects of Crop Yield: Procceding of a Symposium Held at the University of Nebraska, Lincoln, January 20-24. [editor no identificado], 1969.