APA (7th ed.) Citation

Allen, R. (1968). Great airports of the world (2. ed.). Allan.

Chicago Style (17th ed.) Citation

Allen, Roy. Great Airports of the World. 2. ed. London: Allan, 1968.

MLA (9th ed.) Citation

Allen, Roy. Great Airports of the World. 2. ed. Allan, 1968.

Warning: These citations may not always be 100% accurate.