APA (7e ed.) Bronvermelding

Não informado. (1966). Air Pollution Titles. Pennsylvania State University, Center for Air Environmental Studies.

Chicago (17e ed.) Bronvermelding

Não informado. Air Pollution Titles. University Park, Pa: Pennsylvania State University, Center for Air Environmental Studies, 1966.

MLA (8e ed.) Bronvermelding

Não informado. Air Pollution Titles. Pennsylvania State University, Center for Air Environmental Studies, 1966.

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