| APA | SDDF. (2012, February 16). In Acronym Geek. Retrieved 01:39, February 16, 2012, from http://www.acronymgeek.com/SDDF |
| MLA | "SDDF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/SDDF>. |
| MHRA | 'SDDF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/SDDF> [accessed 16 February 2012] |
| Chicago | "SDDF", http://www.acronymgeek.com/SDDF (accessed February 16, 2012). |
| CBE/CSE | SDDF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/SDDF. |
| Bluebook | SDDF, http://www.acronymgeek.com/SDDF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SDDF, http://www.acronymgeek.com/SDDF (optional description here) (as of Feb. 16, 2012, 01:39). |
| AMA | SDDF. Acronym Geek. February 16, 2012, 01:39. Available at: http://www.acronymgeek.com/SDDF. Accessed February 16, 2012, 01:39. |