| APA | PGNE. (2012, February 16). In Acronym Geek. Retrieved 09:50, February 16, 2012, from http://www.acronymgeek.com/PGNE |
| MLA | "PGNE." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PGNE>. |
| MHRA | 'PGNE', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PGNE> [accessed 16 February 2012] |
| Chicago | "PGNE", http://www.acronymgeek.com/PGNE (accessed February 16, 2012). |
| CBE/CSE | PGNE [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PGNE. |
| Bluebook | PGNE, http://www.acronymgeek.com/PGNE (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PGNE, http://www.acronymgeek.com/PGNE (optional description here) (as of Feb. 16, 2012, 09:50). |
| AMA | PGNE. Acronym Geek. February 16, 2012, 09:50. Available at: http://www.acronymgeek.com/PGNE. Accessed February 16, 2012, 09:50. |