| APA | SP-. (2012, February 11). In Acronym Geek. Retrieved 22:53, February 11, 2012, from http://www.acronymgeek.com/SP- |
| MLA | "SP-." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/SP->. |
| MHRA | 'SP-', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/SP-> [accessed 11 February 2012] |
| Chicago | "SP-", http://www.acronymgeek.com/SP- (accessed February 11, 2012). |
| CBE/CSE | SP- [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/SP-. |
| Bluebook | SP-, http://www.acronymgeek.com/SP- (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SP-, http://www.acronymgeek.com/SP- (optional description here) (as of Feb. 11, 2012, 22:53). |
| AMA | SP-. Acronym Geek. February 11, 2012, 22:53. Available at: http://www.acronymgeek.com/SP-. Accessed February 11, 2012, 22:53. |