Citazione Stile APA (7a Edizione)

Ngugi wa Thiong'o, Karau, P. K., & Nguyo, W. (1983). East African agriculture: A textbook for secondary schools (Rev. ed., repr.). Macmillan.

Citazione stile Chigago Style (17a edizione)

Ngugi wa Thiong'o, P. K. Karau, e W. Nguyo. East African Agriculture: A Textbook for Secondary Schools. Rev. ed., repr. London [u.a.]: Macmillan, 1983.

Citatione MLA (9a ed.)

Ngugi wa Thiong'o, et al. East African Agriculture: A Textbook for Secondary Schools. Rev. ed., repr. Macmillan, 1983.