| APA | RIU. (2012, February 10). In Acronym Geek. Retrieved 10:50, February 10, 2012, from http://www.acronymgeek.com/RIU |
| MLA | "RIU." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/RIU>. |
| MHRA | 'RIU', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/RIU> [accessed 10 February 2012] |
| Chicago | "RIU", http://www.acronymgeek.com/RIU (accessed February 10, 2012). |
| CBE/CSE | RIU [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/RIU. |
| Bluebook | RIU, http://www.acronymgeek.com/RIU (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, RIU, http://www.acronymgeek.com/RIU (optional description here) (as of Feb. 10, 2012, 10:50). |
| AMA | RIU. Acronym Geek. February 10, 2012, 10:50. Available at: http://www.acronymgeek.com/RIU. Accessed February 10, 2012, 10:50. |