APA (7th ed.) Citation

Osler, T., & Dodd, E. (1979). Ultramarathoning, the next challenge. World Publications.

Chicago Style (17th ed.) Citation

Osler, Tom, and Ed Dodd. Ultramarathoning, the Next Challenge. Mountain View, Calif: World Publications, 1979.

MLA (9th ed.) Citation

Osler, Tom, and Ed Dodd. Ultramarathoning, the Next Challenge. World Publications, 1979.

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