APA (7e ed.) Bronvermelding

Não informado. Public Health Service Publications. U.S. Department of Health Education and Welfare.

Chicago (17e ed.) Bronvermelding

Não informado. Public Health Service Publications. Washington: U.S. Department of Health Education and Welfare.

MLA (8e ed.) Bronvermelding

Não informado. Public Health Service Publications. U.S. Department of Health Education and Welfare.

Let op: Deze citaties zijn niet altijd 100% accuraat.