| APA | SIR. (2012, February 14). In Acronym Geek. Retrieved 19:41, February 14, 2012, from http://www.acronymgeek.com/SIR |
| MLA | "SIR." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SIR>. |
| MHRA | 'SIR', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SIR> [accessed 14 February 2012] |
| Chicago | "SIR", http://www.acronymgeek.com/SIR (accessed February 14, 2012). |
| CBE/CSE | SIR [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SIR. |
| Bluebook | SIR, http://www.acronymgeek.com/SIR (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SIR, http://www.acronymgeek.com/SIR (optional description here) (as of Feb. 14, 2012, 19:41). |
| AMA | SIR. Acronym Geek. February 14, 2012, 19:41. Available at: http://www.acronymgeek.com/SIR. Accessed February 14, 2012, 19:41. |