Não informado. (1973). Population Reports. George Washington University, Department of Medical and Public Affairs.
Chicago (17e ed.) BronvermeldingNão informado. Population Reports. Washington: George Washington University, Department of Medical and Public Affairs, 1973.
MLA (8e ed.) BronvermeldingNão informado. Population Reports. George Washington University, Department of Medical and Public Affairs, 1973.
Let op: Deze citaties zijn niet altijd 100% accuraat.