Cita APA (7a ed.)

Van de Walle, E., Ohadike, P. O., & Sala-Diakanda, M. (1988). The State of African demography. International Union for the Scientific Study of Population.

Cita Chicago Style (17a ed.)

Van de Walle, Etienne, Patrick O. Ohadike, y Mpembele Sala-Diakanda. The State of African Demography. Liége, Belgium: International Union for the Scientific Study of Population, 1988.

Cita MLA (9a ed.)

Van de Walle, Etienne, et al. The State of African Demography. International Union for the Scientific Study of Population, 1988.