APA (7th ed.) Citation

Ruppenthal, K. M. (1978). Case problems in air transportation. Centre for Transportation Studies, University of British Columbia.

Chicago Style (17th ed.) Citation

Ruppenthal, Karl Maxwell. Case Problems in Air Transportation. Vancouver: Centre for Transportation Studies, University of British Columbia, 1978.

MLA (9th ed.) Citation

Ruppenthal, Karl Maxwell. Case Problems in Air Transportation. Centre for Transportation Studies, University of British Columbia, 1978.