Cita APA (7th ed.)
Maathai, W. (2009). The challenge for Africa (ed.). Pantheon Books.
Cita Chicago (17th ed.)
Maathai, Wangari. The Challenge for Africa. ed. New York: Pantheon Books, 2009.
Cita MLA (9th ed.)
Maathai, Wangari. The Challenge for Africa. ed. Pantheon Books, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.