Willett, G. M., Hyde, J. E., Uhrlaub, M. B., Wendel, C. A. & Karst, G. M. (2002, 22. January). Relative activity of abdominal muscles during commonly prescribed strengthening exercises. Zugriff unter http://www.ncbi.nlm.nih.gov/pubmed/11726260
APA (7th ed.) CitationWillett, G. M., Hyde, J. E., Uhrlaub, M. B., Wendel, C. A., & Karst, G. M. (2001). Relative activity of abdominal muscles during commonly prescribed strengthening exercises. The Journal of Strength and Conditioning Research, 15(4), 480-485.
Chicago Style (17th ed.) CitationWillett, G. M., J. E. Hyde, M. B. Uhrlaub, C. A. Wendel, and G. M. Karst. "Relative Activity of Abdominal Muscles During Commonly Prescribed Strengthening Exercises." The Journal of Strength and Conditioning Research 15, no. 4 (2001): 480-485.
MLA (9th ed.) CitationWillett, G. M., et al. "Relative Activity of Abdominal Muscles During Commonly Prescribed Strengthening Exercises." The Journal of Strength and Conditioning Research, vol. 15, no. 4, 2001, pp. 480-485.