DVS Edition Citation

Knudson, D. (1999, 20. May). Abdominal exercises. Zugriff unter http://www.sportsci.org/news/ferret/ferret9805.html#abd

APA (7th ed.) Citation

Knudson, D. Abdominal exercises.

Chicago Style (17th ed.) Citation

Knudson, D. Abdominal Exercises.

MLA (9th ed.) Citation

Knudson, D. Abdominal Exercises.