APA (7e ed.) Bronvermelding

Não informado. (1969). Environmental Health. Environmental Health Officers Association.

Chicago (17e ed.) Bronvermelding

Não informado. Environmental Health. London: Environmental Health Officers Association, 1969.

MLA (8e ed.) Bronvermelding

Não informado. Environmental Health. Environmental Health Officers Association, 1969.

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