APA (7th ed.) Citation

Duke, D. G. (1927). Airports and airways: Cost, operation and maintenance. The Ronald press company.

Chicago Style (17th ed.) Citation

Duke, Donald G. Airports and Airways: Cost, Operation and Maintenance. New York: The Ronald press company, 1927.

MLA (9th ed.) Citation

Duke, Donald G. Airports and Airways: Cost, Operation and Maintenance. The Ronald press company, 1927.