Cita APA (7a ed.)

Ennis, W. B. (1979). Introduction to crop protection. American Society of Agronomy ; Crop Science Society of America.

Cita Chicago Style (17a ed.)

Ennis, William Brice. Introduction to Crop Protection. Madison, WI: American Society of Agronomy ; Crop Science Society of America, 1979.

Cita MLA (8a ed.)

Ennis, William Brice. Introduction to Crop Protection. American Society of Agronomy ; Crop Science Society of America, 1979.