Cita APA (7a ed.)

Boesen, J., Kikula, I. S., & Maganga, F. P. (1999). Sustainable agriculture in semi-arid Tanzania. DUP (1996).

Cita Chicago Style (17a ed.)

Boesen, Jannik, I. S. Kikula, y Faustin P. Maganga. Sustainable Agriculture in Semi-arid Tanzania. Dar-es-Salaam: DUP (1996), 1999.

Cita MLA (9a ed.)

Boesen, Jannik, et al. Sustainable Agriculture in Semi-arid Tanzania. DUP (1996), 1999.