| APA | OTPG. (2012, February 16). In Acronym Geek. Retrieved 11:37, February 16, 2012, from http://www.acronymgeek.com/OTPG |
| MLA | "OTPG." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OTPG>. |
| MHRA | 'OTPG', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OTPG> [accessed 16 February 2012] |
| Chicago | "OTPG", http://www.acronymgeek.com/OTPG (accessed February 16, 2012). |
| CBE/CSE | OTPG [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OTPG. |
| Bluebook | OTPG, http://www.acronymgeek.com/OTPG (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTPG, http://www.acronymgeek.com/OTPG (optional description here) (as of Feb. 16, 2012, 11:37). |
| AMA | OTPG. Acronym Geek. February 16, 2012, 11:37. Available at: http://www.acronymgeek.com/OTPG. Accessed February 16, 2012, 11:37. |