| APA | PGOO. (2012, February 15). In Acronym Geek. Retrieved 13:55, February 15, 2012, from http://www.acronymgeek.com/PGOO |
| MLA | "PGOO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PGOO>. |
| MHRA | 'PGOO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PGOO> [accessed 15 February 2012] |
| Chicago | "PGOO", http://www.acronymgeek.com/PGOO (accessed February 15, 2012). |
| CBE/CSE | PGOO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PGOO. |
| Bluebook | PGOO, http://www.acronymgeek.com/PGOO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PGOO, http://www.acronymgeek.com/PGOO (optional description here) (as of Feb. 15, 2012, 13:55). |
| AMA | PGOO. Acronym Geek. February 15, 2012, 13:55. Available at: http://www.acronymgeek.com/PGOO. Accessed February 15, 2012, 13:55. |