| APA | IOUD. (2012, February 16). In Acronym Geek. Retrieved 00:12, February 16, 2012, from http://www.acronymgeek.com/IOUD |
| MLA | "IOUD." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/IOUD>. |
| MHRA | 'IOUD', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/IOUD> [accessed 16 February 2012] |
| Chicago | "IOUD", http://www.acronymgeek.com/IOUD (accessed February 16, 2012). |
| CBE/CSE | IOUD [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/IOUD. |
| Bluebook | IOUD, http://www.acronymgeek.com/IOUD (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IOUD, http://www.acronymgeek.com/IOUD (optional description here) (as of Feb. 16, 2012, 00:12). |
| AMA | IOUD. Acronym Geek. February 16, 2012, 00:12. Available at: http://www.acronymgeek.com/IOUD. Accessed February 16, 2012, 00:12. |