APA (7th ed.) Citation

Harrison, R. E. (1947). Pan American World Airways: The system of the flying clippers (Corrected to February 1, 1947.). Pan American.

Chicago Style (17th ed.) Citation

Harrison, Richard Edes. Pan American World Airways: The System of the Flying Clippers. Corrected to February 1, 1947. [S.l.]: Pan American, 1947.

MLA (8th ed.) Citation

Harrison, Richard Edes. Pan American World Airways: The System of the Flying Clippers. Corrected to February 1, 1947. Pan American, 1947.