APA
Bongaarts J., . (1981). The fertility impact of traditional and changing childspacing practices in tropical Africa. Washington-US: United States Agency for International Development.
Chicago
Bongaarts J, . 1981. The fertility impact of traditional and changing childspacing practices in tropical Africa. Washington-US: United States Agency for International Development.
Harvard
Bongaarts J., . (1981). The fertility impact of traditional and changing childspacing practices in tropical Africa. Washington-US: United States Agency for International Development.
MLA
Bongaarts J, . The fertility impact of traditional and changing childspacing practices in tropical Africa. Washington-US: United States Agency for International Development. 1981.