| APA | IHS. (2012, February 9). In Acronym Geek. Retrieved 19:03, February 9, 2012, from http://www.acronymgeek.com/IHS |
| MLA | "IHS." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/IHS>. |
| MHRA | 'IHS', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/IHS> [accessed 9 February 2012] |
| Chicago | "IHS", http://www.acronymgeek.com/IHS (accessed February 9, 2012). |
| CBE/CSE | IHS [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/IHS. |
| Bluebook | IHS, http://www.acronymgeek.com/IHS (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IHS, http://www.acronymgeek.com/IHS (optional description here) (as of Feb. 9, 2012, 19:03). |
| AMA | IHS. Acronym Geek. February 9, 2012, 19:03. Available at: http://www.acronymgeek.com/IHS. Accessed February 9, 2012, 19:03. |