| APA | TPIO. (2012, February 15). In Acronym Geek. Retrieved 13:28, February 15, 2012, from http://www.acronymgeek.com/TPIO |
| MLA | "TPIO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/TPIO>. |
| MHRA | 'TPIO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/TPIO> [accessed 15 February 2012] |
| Chicago | "TPIO", http://www.acronymgeek.com/TPIO (accessed February 15, 2012). |
| CBE/CSE | TPIO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/TPIO. |
| Bluebook | TPIO, http://www.acronymgeek.com/TPIO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TPIO, http://www.acronymgeek.com/TPIO (optional description here) (as of Feb. 15, 2012, 13:28). |
| AMA | TPIO. Acronym Geek. February 15, 2012, 13:28. Available at: http://www.acronymgeek.com/TPIO. Accessed February 15, 2012, 13:28. |