APA (7e ed.) Bronvermelding

Não informado. (1987). Safety & health. National Safety Council.

Chicago (17e ed.) Bronvermelding

Não informado. Safety & Health. Chicago, Ill: National Safety Council, 1987.

MLA (8e ed.) Bronvermelding

Não informado. Safety & Health. National Safety Council, 1987.

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