APA (7th ed.) Citation

Ruppenthal, K. M. (1965). Issues in transportation economics. C. E. Merrill Books.

Chicago Style (17th ed.) Citation

Ruppenthal, Karl Maxwell. Issues in Transportation Economics. Columbus, Ohio: C. E. Merrill Books, 1965.

MLA (9th ed.) Citation

Ruppenthal, Karl Maxwell. Issues in Transportation Economics. C. E. Merrill Books, 1965.