Osborough, C & Peyrebrune, M. (2009, 11. March). Butterfly technique: What happens when swimmers get tired? Zugriff unter http://www.coachesinfo.com/index.php?option=com_content&view=article&id=75:swimming-butterfly-tired&catid=49:swimming-coaching&Itemid=86
APA (7th ed.) CitationOsborough, C., & Peyrebrune, M. Butterfly technique: What happens when swimmers get tired? coachesinfo.com.
Chicago Style (17th ed.) CitationOsborough, C., and M. Peyrebrune. "Butterfly Technique: What Happens When Swimmers Get Tired?" Coachesinfo.com .
MLA (9th ed.) CitationOsborough, C., and M. Peyrebrune. "Butterfly Technique: What Happens When Swimmers Get Tired?" Coachesinfo.com, .
Warning: These citations may not always be 100% accurate.