| APA | OPOQ. (2012, February 16). In Acronym Geek. Retrieved 22:52, February 16, 2012, from http://www.acronymgeek.com/OPOQ |
| MLA | "OPOQ." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OPOQ>. |
| MHRA | 'OPOQ', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OPOQ> [accessed 16 February 2012] |
| Chicago | "OPOQ", http://www.acronymgeek.com/OPOQ (accessed February 16, 2012). |
| CBE/CSE | OPOQ [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OPOQ. |
| Bluebook | OPOQ, http://www.acronymgeek.com/OPOQ (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPOQ, http://www.acronymgeek.com/OPOQ (optional description here) (as of Feb. 16, 2012, 22:52). |
| AMA | OPOQ. Acronym Geek. February 16, 2012, 22:52. Available at: http://www.acronymgeek.com/OPOQ. Accessed February 16, 2012, 22:52. |