| APA | PIYY. (2012, February 15). In Acronym Geek. Retrieved 19:35, February 15, 2012, from http://www.acronymgeek.com/PIYY |
| MLA | "PIYY." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PIYY>. |
| MHRA | 'PIYY', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PIYY> [accessed 15 February 2012] |
| Chicago | "PIYY", http://www.acronymgeek.com/PIYY (accessed February 15, 2012). |
| CBE/CSE | PIYY [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PIYY. |
| Bluebook | PIYY, http://www.acronymgeek.com/PIYY (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PIYY, http://www.acronymgeek.com/PIYY (optional description here) (as of Feb. 15, 2012, 19:35). |
| AMA | PIYY. Acronym Geek. February 15, 2012, 19:35. Available at: http://www.acronymgeek.com/PIYY. Accessed February 15, 2012, 19:35. |