| APA | IDK. (2012, February 13). In Acronym Geek. Retrieved 23:29, February 13, 2012, from http://www.acronymgeek.com/IDK |
| MLA | "IDK." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/IDK>. |
| MHRA | 'IDK', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/IDK> [accessed 13 February 2012] |
| Chicago | "IDK", http://www.acronymgeek.com/IDK (accessed February 13, 2012). |
| CBE/CSE | IDK [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/IDK. |
| Bluebook | IDK, http://www.acronymgeek.com/IDK (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IDK, http://www.acronymgeek.com/IDK (optional description here) (as of Feb. 13, 2012, 23:29). |
| AMA | IDK. Acronym Geek. February 13, 2012, 23:29. Available at: http://www.acronymgeek.com/IDK. Accessed February 13, 2012, 23:29. |