Não informado. Public Health Service Publications. U.S. Department of Health Education and Welfare.
Chicago (17e ed.) BronvermeldingNão informado. Public Health Service Publications. Washington: U.S. Department of Health Education and Welfare.
MLA (8e ed.) BronvermeldingNão informado. Public Health Service Publications. U.S. Department of Health Education and Welfare.
Let op: Deze citaties zijn niet altijd 100% accuraat.