| APA | EPO. (2012, February 9). In Acronym Geek. Retrieved 18:33, February 9, 2012, from http://www.acronymgeek.com/EPO |
| MLA | "EPO." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/EPO>. |
| MHRA | 'EPO', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/EPO> [accessed 9 February 2012] |
| Chicago | "EPO", http://www.acronymgeek.com/EPO (accessed February 9, 2012). |
| CBE/CSE | EPO [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/EPO. |
| Bluebook | EPO, http://www.acronymgeek.com/EPO (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EPO, http://www.acronymgeek.com/EPO (optional description here) (as of Feb. 9, 2012, 18:33). |
| AMA | EPO. Acronym Geek. February 9, 2012, 18:33. Available at: http://www.acronymgeek.com/EPO. Accessed February 9, 2012, 18:33. |