APA (7e ed.) Bronvermelding

Não informado. (1968). Airports International. International Civil Airport Association.

Chicago (17e ed.) Bronvermelding

Não informado. Airports International. Paris: International Civil Airport Association, 1968.

MLA (8e ed.) Bronvermelding

Não informado. Airports International. International Civil Airport Association, 1968.

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