| APA | SO/SI. (2012, February 12). In Acronym Geek. Retrieved 09:30, February 12, 2012, from http://www.acronymgeek.com/SO/SI |
| MLA | "SO/SI." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SO/SI>. |
| MHRA | 'SO/SI', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SO/SI> [accessed 12 February 2012] |
| Chicago | "SO/SI", http://www.acronymgeek.com/SO/SI (accessed February 12, 2012). |
| CBE/CSE | SO/SI [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SO/SI. |
| Bluebook | SO/SI, http://www.acronymgeek.com/SO/SI (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SO/SI, http://www.acronymgeek.com/SO/SI (optional description here) (as of Feb. 12, 2012, 09:30). |
| AMA | SO/SI. Acronym Geek. February 12, 2012, 09:30. Available at: http://www.acronymgeek.com/SO/SI. Accessed February 12, 2012, 09:30. |