| APA | USOA. (2012, February 15). In Acronym Geek. Retrieved 19:28, February 15, 2012, from http://www.acronymgeek.com/USOA |
| MLA | "USOA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/USOA>. |
| MHRA | 'USOA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/USOA> [accessed 15 February 2012] |
| Chicago | "USOA", http://www.acronymgeek.com/USOA (accessed February 15, 2012). |
| CBE/CSE | USOA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/USOA. |
| Bluebook | USOA, http://www.acronymgeek.com/USOA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, USOA, http://www.acronymgeek.com/USOA (optional description here) (as of Feb. 15, 2012, 19:28). |
| AMA | USOA. Acronym Geek. February 15, 2012, 19:28. Available at: http://www.acronymgeek.com/USOA. Accessed February 15, 2012, 19:28. |