Citazione Stile APA (7a Edizione)

Udo, R. K. (1983). The human geography of tropical Africa (Reprinted.). Heinemann.

Citazione stile Chigago Style (17a edizione)

Udo, Reuben Kenrick. The Human Geography of Tropical Africa. Reprinted. Ibadan [u.a.]: Heinemann, 1983.

Citatione MLA (9a ed.)

Udo, Reuben Kenrick. The Human Geography of Tropical Africa. Reprinted. Heinemann, 1983.