APA (7e ed.) Bronvermelding

Não informado. (1970). Commerce today. U.S. Department of Commerce.

Chicago (17e ed.) Bronvermelding

Não informado. Commerce Today. Washington: U.S. Department of Commerce, 1970.

MLA (8e ed.) Bronvermelding

Não informado. Commerce Today. U.S. Department of Commerce, 1970.

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