Cita APA (7a ed.)

Perkins, W. A., & Stembridge, J. H. (1970). Nigeria: A descriptive geography (3. ed., 5. impression.). Oxford Univ. Press.

Cita Chicago Style (17a ed.)

Perkins, W. A., y Jasper Harry Stembridge. Nigeria: A Descriptive Geography. 3. ed., 5. impression. Ibadan: Oxford Univ. Press, 1970.

Cita MLA (9a ed.)

Perkins, W. A., y Jasper Harry Stembridge. Nigeria: A Descriptive Geography. 3. ed., 5. impression. Oxford Univ. Press, 1970.