| APA | PIYD. (2012, February 17). In Acronym Geek. Retrieved 06:28, February 17, 2012, from http://www.acronymgeek.com/PIYD |
| MLA | "PIYD." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/PIYD>. |
| MHRA | 'PIYD', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/PIYD> [accessed 17 February 2012] |
| Chicago | "PIYD", http://www.acronymgeek.com/PIYD (accessed February 17, 2012). |
| CBE/CSE | PIYD [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/PIYD. |
| Bluebook | PIYD, http://www.acronymgeek.com/PIYD (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PIYD, http://www.acronymgeek.com/PIYD (optional description here) (as of Feb. 17, 2012, 06:28). |
| AMA | PIYD. Acronym Geek. February 17, 2012, 06:28. Available at: http://www.acronymgeek.com/PIYD. Accessed February 17, 2012, 06:28. |