| APA | PGMO. (2012, February 16). In Acronym Geek. Retrieved 21:51, February 16, 2012, from http://www.acronymgeek.com/PGMO |
| MLA | "PGMO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PGMO>. |
| MHRA | 'PGMO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PGMO> [accessed 16 February 2012] |
| Chicago | "PGMO", http://www.acronymgeek.com/PGMO (accessed February 16, 2012). |
| CBE/CSE | PGMO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PGMO. |
| Bluebook | PGMO, http://www.acronymgeek.com/PGMO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PGMO, http://www.acronymgeek.com/PGMO (optional description here) (as of Feb. 16, 2012, 21:51). |
| AMA | PGMO. Acronym Geek. February 16, 2012, 21:51. Available at: http://www.acronymgeek.com/PGMO. Accessed February 16, 2012, 21:51. |