| APA | QSO. (2012, February 9). In Acronym Geek. Retrieved 19:20, February 9, 2012, from http://www.acronymgeek.com/QSO |
| MLA | "QSO." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/QSO>. |
| MHRA | 'QSO', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/QSO> [accessed 9 February 2012] |
| Chicago | "QSO", http://www.acronymgeek.com/QSO (accessed February 9, 2012). |
| CBE/CSE | QSO [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/QSO. |
| Bluebook | QSO, http://www.acronymgeek.com/QSO (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QSO, http://www.acronymgeek.com/QSO (optional description here) (as of Feb. 9, 2012, 19:20). |
| AMA | QSO. Acronym Geek. February 9, 2012, 19:20. Available at: http://www.acronymgeek.com/QSO. Accessed February 9, 2012, 19:20. |