APA (7th ed.) Citation
Heilig, G., Büttner, T., & Lutz, W. (1991). Germany's Population: Turbulent Past, Uncertain Future (1. Aufl.). International Institute for Applied Systems Analysis.
Chicago Style (17th ed.) Citation
Heilig, Gerhard, Thomas Büttner, and Wolfgang Lutz. Germany's Population: Turbulent Past, Uncertain Future. 1. Aufl. Laxenburg: International Institute for Applied Systems Analysis, 1991.
MLA (9th ed.) Citation
Heilig, Gerhard, et al. Germany's Population: Turbulent Past, Uncertain Future. 1. Aufl. International Institute for Applied Systems Analysis, 1991.
Warning: These citations may not always be 100% accurate.