Johnston, D. (2007, 16. April). David Johnston's 6 stride checkmark for pole vault. Zugriff unter http://www.nacactfca.org/articles/Johnston6stride.pdf
APA-Zitierstil (7. Ausg.)Johnston, D. (2006). David Johnston's 6 stride checkmark for pole vault. IAAF Report on 15th NACACTFCA Congress 15th NACACTFCA Congress on Endurance, Boca Chica, Dominican Republic, October 2005.
Chicago-Zitierstil (17. Ausg.)Johnston, D. "David Johnston's 6 Stride Checkmark for Pole Vault." IAAF Report on 15th NACACTFCA Congress 15th NACACTFCA Congress on Endurance, Boca Chica, Dominican Republic, October 2005 2006.
MLA-Zitierstil (9. Ausg.)Johnston, D. "David Johnston's 6 Stride Checkmark for Pole Vault." IAAF Report on 15th NACACTFCA Congress 15th NACACTFCA Congress on Endurance, Boca Chica, Dominican Republic, October 2005, 2006.