APA (7e ed.) Bronvermelding

Não informado. (1981). Energy progress. American Institute of Chemical Engineers.

Chicago (17e ed.) Bronvermelding

Não informado. Energy Progress. New York: American Institute of Chemical Engineers, 1981.

MLA (8e ed.) Bronvermelding

Não informado. Energy Progress. American Institute of Chemical Engineers, 1981.

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