| APA | PGOP. (2012, February 16). In Acronym Geek. Retrieved 04:07, February 16, 2012, from http://www.acronymgeek.com/PGOP |
| MLA | "PGOP." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PGOP>. |
| MHRA | 'PGOP', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PGOP> [accessed 16 February 2012] |
| Chicago | "PGOP", http://www.acronymgeek.com/PGOP (accessed February 16, 2012). |
| CBE/CSE | PGOP [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PGOP. |
| Bluebook | PGOP, http://www.acronymgeek.com/PGOP (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PGOP, http://www.acronymgeek.com/PGOP (optional description here) (as of Feb. 16, 2012, 04:07). |
| AMA | PGOP. Acronym Geek. February 16, 2012, 04:07. Available at: http://www.acronymgeek.com/PGOP. Accessed February 16, 2012, 04:07. |