| APA | S2U. (2012, February 11). In Acronym Geek. Retrieved 22:35, February 11, 2012, from http://www.acronymgeek.com/S2U |
| MLA | "S2U." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/S2U>. |
| MHRA | 'S2U', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/S2U> [accessed 11 February 2012] |
| Chicago | "S2U", http://www.acronymgeek.com/S2U (accessed February 11, 2012). |
| CBE/CSE | S2U [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/S2U. |
| Bluebook | S2U, http://www.acronymgeek.com/S2U (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, S2U, http://www.acronymgeek.com/S2U (optional description here) (as of Feb. 11, 2012, 22:35). |
| AMA | S2U. Acronym Geek. February 11, 2012, 22:35. Available at: http://www.acronymgeek.com/S2U. Accessed February 11, 2012, 22:35. |