| APA | PGNI. (2012, February 15). In Acronym Geek. Retrieved 11:32, February 15, 2012, from http://www.acronymgeek.com/PGNI |
| MLA | "PGNI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PGNI>. |
| MHRA | 'PGNI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PGNI> [accessed 15 February 2012] |
| Chicago | "PGNI", http://www.acronymgeek.com/PGNI (accessed February 15, 2012). |
| CBE/CSE | PGNI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PGNI. |
| Bluebook | PGNI, http://www.acronymgeek.com/PGNI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PGNI, http://www.acronymgeek.com/PGNI (optional description here) (as of Feb. 15, 2012, 11:32). |
| AMA | PGNI. Acronym Geek. February 15, 2012, 11:32. Available at: http://www.acronymgeek.com/PGNI. Accessed February 15, 2012, 11:32. |