Cita APA (7th ed.)

Harrison, P. (1987). The greening of Africa: Breaking through in the battle for land and food. Penguin.

Cita Chicago (17th ed.)

Harrison, Paul. The Greening of Africa: Breaking Through in the Battle for Land and Food. New York, N.Y: Penguin, 1987.

Cita MLA (9th ed.)

Harrison, Paul. The Greening of Africa: Breaking Through in the Battle for Land and Food. Penguin, 1987.