Cita APA (7a ed.)

Glen, A., & WIlliams, M. (1981). Farming (3. ed., reprinted.). Heinemann.

Cita Chicago Style (17a ed.)

Glen, Ann, y Michael WIlliams. Farming. 3. ed., reprinted. London [u.a.]: Heinemann, 1981.

Cita MLA (9a ed.)

Glen, Ann, y Michael WIlliams. Farming. 3. ed., reprinted. Heinemann, 1981.