APA (7th ed.) Citation

Barker, J. (1989). Agricultural marketing (2. ed.). Oxford Univ. Pr.

Chicago Style (17th ed.) Citation

Barker, John. Agricultural Marketing. 2. ed. Oxford u.a: Oxford Univ. Pr, 1989.

MLA (9th ed.) Citation

Barker, John. Agricultural Marketing. 2. ed. Oxford Univ. Pr, 1989.