| APA | A/O. (2012, February 10). In Acronym Geek. Retrieved 13:16, February 10, 2012, from http://www.acronymgeek.com/A/O |
| MLA | "A/O." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/A/O>. |
| MHRA | 'A/O', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/A/O> [accessed 10 February 2012] |
| Chicago | "A/O", http://www.acronymgeek.com/A/O (accessed February 10, 2012). |
| CBE/CSE | A/O [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/A/O. |
| Bluebook | A/O, http://www.acronymgeek.com/A/O (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, A/O, http://www.acronymgeek.com/A/O (optional description here) (as of Feb. 10, 2012, 13:16). |
| AMA | A/O. Acronym Geek. February 10, 2012, 13:16. Available at: http://www.acronymgeek.com/A/O. Accessed February 10, 2012, 13:16. |