| APA | ERPX. (2012, February 16). In Acronym Geek. Retrieved 19:20, February 16, 2012, from http://www.acronymgeek.com/ERPX |
| MLA | "ERPX." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ERPX>. |
| MHRA | 'ERPX', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ERPX> [accessed 16 February 2012] |
| Chicago | "ERPX", http://www.acronymgeek.com/ERPX (accessed February 16, 2012). |
| CBE/CSE | ERPX [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ERPX. |
| Bluebook | ERPX, http://www.acronymgeek.com/ERPX (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ERPX, http://www.acronymgeek.com/ERPX (optional description here) (as of Feb. 16, 2012, 19:20). |
| AMA | ERPX. Acronym Geek. February 16, 2012, 19:20. Available at: http://www.acronymgeek.com/ERPX. Accessed February 16, 2012, 19:20. |