APA
United Nations. Economic and Social Commission for Asia and the Pacific, . (1997). Levels and trends of fertility and their determinants for small geographic areas in the ESCAP region. New York: United Nations.
Chicago
United Nations. Economic and Social Commission for Asia and the Pacific, . 1997. Levels and trends of fertility and their determinants for small geographic areas in the ESCAP region. New York: United Nations.
Harvard
United Nations. Economic and Social Commission for Asia and the Pacific, . (1997). Levels and trends of fertility and their determinants for small geographic areas in the ESCAP region. New York: United Nations.
MLA
United Nations. Economic and Social Commission for Asia and the Pacific, . Levels and trends of fertility and their determinants for small geographic areas in the ESCAP region. New York: United Nations. 1997.