| APA | QIDN. (2012, February 15). In Acronym Geek. Retrieved 18:16, February 15, 2012, from http://www.acronymgeek.com/QIDN |
| MLA | "QIDN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/QIDN>. |
| MHRA | 'QIDN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/QIDN> [accessed 15 February 2012] |
| Chicago | "QIDN", http://www.acronymgeek.com/QIDN (accessed February 15, 2012). |
| CBE/CSE | QIDN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/QIDN. |
| Bluebook | QIDN, http://www.acronymgeek.com/QIDN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QIDN, http://www.acronymgeek.com/QIDN (optional description here) (as of Feb. 15, 2012, 18:16). |
| AMA | QIDN. Acronym Geek. February 15, 2012, 18:16. Available at: http://www.acronymgeek.com/QIDN. Accessed February 15, 2012, 18:16. |