| APA | SO13. (2012, February 11). In Acronym Geek. Retrieved 20:01, February 11, 2012, from http://www.acronymgeek.com/SO13 |
| MLA | "SO13." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/SO13>. |
| MHRA | 'SO13', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/SO13> [accessed 11 February 2012] |
| Chicago | "SO13", http://www.acronymgeek.com/SO13 (accessed February 11, 2012). |
| CBE/CSE | SO13 [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/SO13. |
| Bluebook | SO13, http://www.acronymgeek.com/SO13 (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SO13, http://www.acronymgeek.com/SO13 (optional description here) (as of Feb. 11, 2012, 20:01). |
| AMA | SO13. Acronym Geek. February 11, 2012, 20:01. Available at: http://www.acronymgeek.com/SO13. Accessed February 11, 2012, 20:01. |