Grossman, W. L. (1947). Air passenger traffic. Chemical Pub. Co., Remsen Press Division.
Cita Chicago (17th ed.)Grossman, William L. Air Passenger Traffic. Brooklyn, N.Y.: Chemical Pub. Co., Remsen Press Division, 1947.
Cita MLA (8th ed.)Grossman, William L. Air Passenger Traffic. Chemical Pub. Co., Remsen Press Division, 1947.
Atenció: Aquestes cites poden no estar 100% correctes.