| APA | GPX. (2012, February 14). In Acronym Geek. Retrieved 10:21, February 14, 2012, from http://www.acronymgeek.com/GPX |
| MLA | "GPX." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GPX>. |
| MHRA | 'GPX', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GPX> [accessed 14 February 2012] |
| Chicago | "GPX", http://www.acronymgeek.com/GPX (accessed February 14, 2012). |
| CBE/CSE | GPX [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GPX. |
| Bluebook | GPX, http://www.acronymgeek.com/GPX (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPX, http://www.acronymgeek.com/GPX (optional description here) (as of Feb. 14, 2012, 10:21). |
| AMA | GPX. Acronym Geek. February 14, 2012, 10:21. Available at: http://www.acronymgeek.com/GPX. Accessed February 14, 2012, 10:21. |