| APA | SOPG. (2012, February 14). In Acronym Geek. Retrieved 18:44, February 14, 2012, from http://www.acronymgeek.com/SOPG |
| MLA | "SOPG." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SOPG>. |
| MHRA | 'SOPG', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SOPG> [accessed 14 February 2012] |
| Chicago | "SOPG", http://www.acronymgeek.com/SOPG (accessed February 14, 2012). |
| CBE/CSE | SOPG [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SOPG. |
| Bluebook | SOPG, http://www.acronymgeek.com/SOPG (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SOPG, http://www.acronymgeek.com/SOPG (optional description here) (as of Feb. 14, 2012, 18:44). |
| AMA | SOPG. Acronym Geek. February 14, 2012, 18:44. Available at: http://www.acronymgeek.com/SOPG. Accessed February 14, 2012, 18:44. |