| APA | PNYO. (2012, February 17). In Acronym Geek. Retrieved 00:42, February 17, 2012, from http://www.acronymgeek.com/PNYO |
| MLA | "PNYO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/PNYO>. |
| MHRA | 'PNYO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/PNYO> [accessed 17 February 2012] |
| Chicago | "PNYO", http://www.acronymgeek.com/PNYO (accessed February 17, 2012). |
| CBE/CSE | PNYO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/PNYO. |
| Bluebook | PNYO, http://www.acronymgeek.com/PNYO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PNYO, http://www.acronymgeek.com/PNYO (optional description here) (as of Feb. 17, 2012, 00:42). |
| AMA | PNYO. Acronym Geek. February 17, 2012, 00:42. Available at: http://www.acronymgeek.com/PNYO. Accessed February 17, 2012, 00:42. |