| APA | IHWO. (2012, February 15). In Acronym Geek. Retrieved 16:58, February 15, 2012, from http://www.acronymgeek.com/IHWO |
| MLA | "IHWO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/IHWO>. |
| MHRA | 'IHWO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/IHWO> [accessed 15 February 2012] |
| Chicago | "IHWO", http://www.acronymgeek.com/IHWO (accessed February 15, 2012). |
| CBE/CSE | IHWO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/IHWO. |
| Bluebook | IHWO, http://www.acronymgeek.com/IHWO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IHWO, http://www.acronymgeek.com/IHWO (optional description here) (as of Feb. 15, 2012, 16:58). |
| AMA | IHWO. Acronym Geek. February 15, 2012, 16:58. Available at: http://www.acronymgeek.com/IHWO. Accessed February 15, 2012, 16:58. |