APA (7th ed.) Citation

Osler, T., & Dodd, E. (1979). Ultra-marathoning: The next challenge. World Publications.

Chicago Style (17th ed.) Citation

Osler, Tom, and Ed Dodd. Ultra-marathoning: The Next Challenge. Mountain view, California: World Publications, 1979.

MLA (9th ed.) Citation

Osler, Tom, and Ed Dodd. Ultra-marathoning: The Next Challenge. World Publications, 1979.