| APA | DDYF. (2012, February 15). In Acronym Geek. Retrieved 10:22, February 15, 2012, from http://www.acronymgeek.com/DDYF |
| MLA | "DDYF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DDYF>. |
| MHRA | 'DDYF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DDYF> [accessed 15 February 2012] |
| Chicago | "DDYF", http://www.acronymgeek.com/DDYF (accessed February 15, 2012). |
| CBE/CSE | DDYF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DDYF. |
| Bluebook | DDYF, http://www.acronymgeek.com/DDYF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDYF, http://www.acronymgeek.com/DDYF (optional description here) (as of Feb. 15, 2012, 10:22). |
| AMA | DDYF. Acronym Geek. February 15, 2012, 10:22. Available at: http://www.acronymgeek.com/DDYF. Accessed February 15, 2012, 10:22. |