| APA | P2I. (2012, February 13). In Acronym Geek. Retrieved 21:23, February 13, 2012, from http://www.acronymgeek.com/P2I |
| MLA | "P2I." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/P2I>. |
| MHRA | 'P2I', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/P2I> [accessed 13 February 2012] |
| Chicago | "P2I", http://www.acronymgeek.com/P2I (accessed February 13, 2012). |
| CBE/CSE | P2I [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/P2I. |
| Bluebook | P2I, http://www.acronymgeek.com/P2I (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, P2I, http://www.acronymgeek.com/P2I (optional description here) (as of Feb. 13, 2012, 21:23). |
| AMA | P2I. Acronym Geek. February 13, 2012, 21:23. Available at: http://www.acronymgeek.com/P2I. Accessed February 13, 2012, 21:23. |