Não informado. (1968). Airports International. International Civil Airport Association.
Chicago-viite (17. p.)Não informado. Airports International. Paris: International Civil Airport Association, 1968.
MLA-viite (8. p.)Não informado. Airports International. International Civil Airport Association, 1968.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.