| APA | PIY. (2012, February 14). In Acronym Geek. Retrieved 09:48, February 14, 2012, from http://www.acronymgeek.com/PIY |
| MLA | "PIY." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PIY>. |
| MHRA | 'PIY', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PIY> [accessed 14 February 2012] |
| Chicago | "PIY", http://www.acronymgeek.com/PIY (accessed February 14, 2012). |
| CBE/CSE | PIY [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PIY. |
| Bluebook | PIY, http://www.acronymgeek.com/PIY (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PIY, http://www.acronymgeek.com/PIY (optional description here) (as of Feb. 14, 2012, 09:48). |
| AMA | PIY. Acronym Geek. February 14, 2012, 09:48. Available at: http://www.acronymgeek.com/PIY. Accessed February 14, 2012, 09:48. |