Cita APA (7a ed.)

Ban, A. W. v. d., & Hawkins, H. S. Agricultural extension (7th edition.). Longman Scientific & Technical.

Cita Chicago Style (17a ed.)

Ban, A. W. van den, y H. S. Hawkins. Agricultural Extension. 7th edition. New York: Longman Scientific & Technical.

Cita MLA (8a ed.)

Ban, A. W. van den, y H. S. Hawkins. Agricultural Extension. 7th edition. Longman Scientific & Technical.