| APA | I.S.. (2012, February 16). In Acronym Geek. Retrieved 04:06, February 16, 2012, from http://www.acronymgeek.com/I.S. |
| MLA | "I.S.." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/I.S.>. |
| MHRA | 'I.S.', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/I.S.> [accessed 16 February 2012] |
| Chicago | "I.S.", http://www.acronymgeek.com/I.S. (accessed February 16, 2012). |
| CBE/CSE | I.S. [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/I.S.. |
| Bluebook | I.S., http://www.acronymgeek.com/I.S. (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, I.S., http://www.acronymgeek.com/I.S. (optional description here) (as of Feb. 16, 2012, 04:06). |
| AMA | I.S.. Acronym Geek. February 16, 2012, 04:06. Available at: http://www.acronymgeek.com/I.S.. Accessed February 16, 2012, 04:06. |