| APA | DDYI. (2012, February 16). In Acronym Geek. Retrieved 07:21, February 16, 2012, from http://www.acronymgeek.com/DDYI |
| MLA | "DDYI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DDYI>. |
| MHRA | 'DDYI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DDYI> [accessed 16 February 2012] |
| Chicago | "DDYI", http://www.acronymgeek.com/DDYI (accessed February 16, 2012). |
| CBE/CSE | DDYI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DDYI. |
| Bluebook | DDYI, http://www.acronymgeek.com/DDYI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDYI, http://www.acronymgeek.com/DDYI (optional description here) (as of Feb. 16, 2012, 07:21). |
| AMA | DDYI. Acronym Geek. February 16, 2012, 07:21. Available at: http://www.acronymgeek.com/DDYI. Accessed February 16, 2012, 07:21. |