APA (7e ed.) Bronvermelding

Não informado. (1980). International Petrochemical Developments. Rickian.

Chicago (17e ed.) Bronvermelding

Não informado. International Petrochemical Developments. Palm Beach, Fla: Rickian, 1980.

MLA (8e ed.) Bronvermelding

Não informado. International Petrochemical Developments. Rickian, 1980.

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