| 2006 , , Geneva: World Health Organization, Page 110, Part 2 | , World Health Organization, Retrieved 21-12-2016 |
|---|---|
| Houssain Abouzaid, Gabrielle Aggazzotti, Jamie Bartram, et al | Campbell 2012 , , North Carolina: UNC Press Books, Page 165 |
, Enjoy Swimming, Retrieved 21-12-2016.
| Jiang-Hua Li, Zhi-Hui Wang, Xiao-Juan Zhu, et al | Olympic Studies Centre 2015 , AQUATICS: History of Swimming at the Olympic Games, Switzerland: Olympic Studies Centre, Page 2 |
|---|---|
| Houssain Abouzaid, Gabrielle Aggazzotti, Jamie Bartram, et al | Olympic Studies Centre 2015 , AQUATICS: History of Swimming at the Olympic Games, Switzerland: Olympic Studies Centre, Page 2 |
Campbell 2012 , , North Carolina: UNC Press Books, Page 165.
13