APA (7th ed.) Citation

International Map Company, i. Routes of the flying clipper ships: Passengers, mail, express. Pan American Airways System.

Chicago Style (17th ed.) Citation

International Map Company, inc. Routes of the Flying Clipper Ships: Passengers, Mail, Express. [New York?]: Pan American Airways System.

MLA (8th ed.) Citation

International Map Company, inc. Routes of the Flying Clipper Ships: Passengers, Mail, Express. Pan American Airways System.