| APA | OPDT. (2012, February 16). In Acronym Geek. Retrieved 11:21, February 16, 2012, from http://www.acronymgeek.com/OPDT |
| MLA | "OPDT." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OPDT>. |
| MHRA | 'OPDT', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OPDT> [accessed 16 February 2012] |
| Chicago | "OPDT", http://www.acronymgeek.com/OPDT (accessed February 16, 2012). |
| CBE/CSE | OPDT [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OPDT. |
| Bluebook | OPDT, http://www.acronymgeek.com/OPDT (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPDT, http://www.acronymgeek.com/OPDT (optional description here) (as of Feb. 16, 2012, 11:21). |
| AMA | OPDT. Acronym Geek. February 16, 2012, 11:21. Available at: http://www.acronymgeek.com/OPDT. Accessed February 16, 2012, 11:21. |