APA (7e ed.) Bronvermelding

Não informado. (1977). Health and Hygiene. Royal Institute of Public Health and Hygiene.

Chicago (17e ed.) Bronvermelding

Não informado. Health and Hygiene. London: Royal Institute of Public Health and Hygiene, 1977.

MLA (8e ed.) Bronvermelding

Não informado. Health and Hygiene. Royal Institute of Public Health and Hygiene, 1977.

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