| APA | PSQO. (2012, February 16). In Acronym Geek. Retrieved 09:10, February 16, 2012, from http://www.acronymgeek.com/PSQO |
| MLA | "PSQO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PSQO>. |
| MHRA | 'PSQO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PSQO> [accessed 16 February 2012] |
| Chicago | "PSQO", http://www.acronymgeek.com/PSQO (accessed February 16, 2012). |
| CBE/CSE | PSQO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PSQO. |
| Bluebook | PSQO, http://www.acronymgeek.com/PSQO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PSQO, http://www.acronymgeek.com/PSQO (optional description here) (as of Feb. 16, 2012, 09:10). |
| AMA | PSQO. Acronym Geek. February 16, 2012, 09:10. Available at: http://www.acronymgeek.com/PSQO. Accessed February 16, 2012, 09:10. |