| APA | PPGN. (2012, February 15). In Acronym Geek. Retrieved 16:24, February 15, 2012, from http://www.acronymgeek.com/PPGN |
| MLA | "PPGN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PPGN>. |
| MHRA | 'PPGN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PPGN> [accessed 15 February 2012] |
| Chicago | "PPGN", http://www.acronymgeek.com/PPGN (accessed February 15, 2012). |
| CBE/CSE | PPGN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PPGN. |
| Bluebook | PPGN, http://www.acronymgeek.com/PPGN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PPGN, http://www.acronymgeek.com/PPGN (optional description here) (as of Feb. 15, 2012, 16:24). |
| AMA | PPGN. Acronym Geek. February 15, 2012, 16:24. Available at: http://www.acronymgeek.com/PPGN. Accessed February 15, 2012, 16:24. |