Citazione APA

Official Airline Guides, inc. Airline map of the United States. American Aviation Publications.

Stile di citazione Chicago

Official Airline Guides, inc. Airline Map of the United States. [Chicago, Ill.: American Aviation Publications.

Citazione MLA

Official Airline Guides, inc. Airline Map of the United States. American Aviation Publications.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.