Cita APA

Ennis, W. B., & Ennis, W. B. (1979). Introduction to crop protection. Menasha, Wis.: American Society of Agronomy Crop Science Society of America.

Citación estilo Chicago

Ennis, William Brice, y William Brice Ennis. Introduction to Crop Protection. Menasha, Wis.: American Society of Agronomy Crop Science Society of America, 1979.

Cita MLA

Ennis, William Brice, y William Brice Ennis. Introduction to Crop Protection. Menasha, Wis.: American Society of Agronomy Crop Science Society of America, 1979.