APA
U.S. POPULATION REFERENCE BUREAU INC, U.S. POPULATION REFERENCE BUREAU INC, . (1988). Annual report 1988. Washington: D.C. Population Reference Bureau Inc.
Chicago
U.S. POPULATION REFERENCE BUREAU INC, U.S. POPULATION REFERENCE BUREAU INC, . 1988. Annual report 1988. Washington: D.C. Population Reference Bureau Inc.
Harvard
U.S. POPULATION REFERENCE BUREAU INC, U.S. POPULATION REFERENCE BUREAU INC, . (1988). Annual report 1988. Washington: D.C. Population Reference Bureau Inc.
MLA
U.S. POPULATION REFERENCE BUREAU INC, U.S. POPULATION REFERENCE BUREAU INC, . Annual report 1988. Washington: D.C. Population Reference Bureau Inc. 1988.
