| APA | PGNN. (2012, February 16). In Acronym Geek. Retrieved 02:35, February 16, 2012, from http://www.acronymgeek.com/PGNN |
| MLA | "PGNN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PGNN>. |
| MHRA | 'PGNN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PGNN> [accessed 16 February 2012] |
| Chicago | "PGNN", http://www.acronymgeek.com/PGNN (accessed February 16, 2012). |
| CBE/CSE | PGNN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PGNN. |
| Bluebook | PGNN, http://www.acronymgeek.com/PGNN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PGNN, http://www.acronymgeek.com/PGNN (optional description here) (as of Feb. 16, 2012, 02:35). |
| AMA | PGNN. Acronym Geek. February 16, 2012, 02:35. Available at: http://www.acronymgeek.com/PGNN. Accessed February 16, 2012, 02:35. |