| APA | ERPU. (2012, February 15). In Acronym Geek. Retrieved 07:15, February 15, 2012, from http://www.acronymgeek.com/ERPU |
| MLA | "ERPU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ERPU>. |
| MHRA | 'ERPU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ERPU> [accessed 15 February 2012] |
| Chicago | "ERPU", http://www.acronymgeek.com/ERPU (accessed February 15, 2012). |
| CBE/CSE | ERPU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ERPU. |
| Bluebook | ERPU, http://www.acronymgeek.com/ERPU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ERPU, http://www.acronymgeek.com/ERPU (optional description here) (as of Feb. 15, 2012, 07:15). |
| AMA | ERPU. Acronym Geek. February 15, 2012, 07:15. Available at: http://www.acronymgeek.com/ERPU. Accessed February 15, 2012, 07:15. |