APA (7th ed.) Citation

National Travel and Airline Careers. (1979). Worldwide tours: Operating instructions and use of the Worldwide tour guides. National Travel & Airline Careers.

Chicago Style (17th ed.) Citation

National Travel and Airline Careers. Worldwide Tours: Operating Instructions and Use of the Worldwide Tour Guides. [New York]: National Travel & Airline Careers, 1979.

MLA (8th ed.) Citation

National Travel and Airline Careers. Worldwide Tours: Operating Instructions and Use of the Worldwide Tour Guides. National Travel & Airline Careers, 1979.