| APA | OTPL. (2012, February 16). In Acronym Geek. Retrieved 07:51, February 16, 2012, from http://www.acronymgeek.com/OTPL |
| MLA | "OTPL." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OTPL>. |
| MHRA | 'OTPL', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OTPL> [accessed 16 February 2012] |
| Chicago | "OTPL", http://www.acronymgeek.com/OTPL (accessed February 16, 2012). |
| CBE/CSE | OTPL [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OTPL. |
| Bluebook | OTPL, http://www.acronymgeek.com/OTPL (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTPL, http://www.acronymgeek.com/OTPL (optional description here) (as of Feb. 16, 2012, 07:51). |
| AMA | OTPL. Acronym Geek. February 16, 2012, 07:51. Available at: http://www.acronymgeek.com/OTPL. Accessed February 16, 2012, 07:51. |