| APA | SEN. (2012, February 14). In Acronym Geek. Retrieved 10:24, February 14, 2012, from http://www.acronymgeek.com/SEN |
| MLA | "SEN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SEN>. |
| MHRA | 'SEN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SEN> [accessed 14 February 2012] |
| Chicago | "SEN", http://www.acronymgeek.com/SEN (accessed February 14, 2012). |
| CBE/CSE | SEN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SEN. |
| Bluebook | SEN, http://www.acronymgeek.com/SEN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SEN, http://www.acronymgeek.com/SEN (optional description here) (as of Feb. 14, 2012, 10:24). |
| AMA | SEN. Acronym Geek. February 14, 2012, 10:24. Available at: http://www.acronymgeek.com/SEN. Accessed February 14, 2012, 10:24. |