| APA | DIRR. (2012, February 17). In Acronym Geek. Retrieved 02:26, February 17, 2012, from http://www.acronymgeek.com/DIRR |
| MLA | "DIRR." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/DIRR>. |
| MHRA | 'DIRR', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/DIRR> [accessed 17 February 2012] |
| Chicago | "DIRR", http://www.acronymgeek.com/DIRR (accessed February 17, 2012). |
| CBE/CSE | DIRR [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/DIRR. |
| Bluebook | DIRR, http://www.acronymgeek.com/DIRR (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DIRR, http://www.acronymgeek.com/DIRR (optional description here) (as of Feb. 17, 2012, 02:26). |
| AMA | DIRR. Acronym Geek. February 17, 2012, 02:26. Available at: http://www.acronymgeek.com/DIRR. Accessed February 17, 2012, 02:26. |