| APA | SPDS. (2012, February 16). In Acronym Geek. Retrieved 08:15, February 16, 2012, from http://www.acronymgeek.com/SPDS |
| MLA | "SPDS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/SPDS>. |
| MHRA | 'SPDS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/SPDS> [accessed 16 February 2012] |
| Chicago | "SPDS", http://www.acronymgeek.com/SPDS (accessed February 16, 2012). |
| CBE/CSE | SPDS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/SPDS. |
| Bluebook | SPDS, http://www.acronymgeek.com/SPDS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPDS, http://www.acronymgeek.com/SPDS (optional description here) (as of Feb. 16, 2012, 08:15). |
| AMA | SPDS. Acronym Geek. February 16, 2012, 08:15. Available at: http://www.acronymgeek.com/SPDS. Accessed February 16, 2012, 08:15. |