Cita APA (7th ed.)

Lutz, W., Vaupel, J. W., & Ahlburg, D. A. (1999). Frontiers of population forecasting. Population Council.

Cita Chicago (17th ed.)

Lutz, Wolfgang, James W. Vaupel, i Dennis A. Ahlburg. Frontiers of Population Forecasting. New York: Population Council, 1999.

Cita MLA (8th ed.)

Lutz, Wolfgang, et al. Frontiers of Population Forecasting. Population Council, 1999.