| APA | OPUT. (2012, February 16). In Acronym Geek. Retrieved 11:05, February 16, 2012, from http://www.acronymgeek.com/OPUT |
| MLA | "OPUT." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OPUT>. |
| MHRA | 'OPUT', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OPUT> [accessed 16 February 2012] |
| Chicago | "OPUT", http://www.acronymgeek.com/OPUT (accessed February 16, 2012). |
| CBE/CSE | OPUT [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OPUT. |
| Bluebook | OPUT, http://www.acronymgeek.com/OPUT (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPUT, http://www.acronymgeek.com/OPUT (optional description here) (as of Feb. 16, 2012, 11:05). |
| AMA | OPUT. Acronym Geek. February 16, 2012, 11:05. Available at: http://www.acronymgeek.com/OPUT. Accessed February 16, 2012, 11:05. |