| APA | SPS. (2012, February 14). In Acronym Geek. Retrieved 09:48, February 14, 2012, from http://www.acronymgeek.com/SPS |
| MLA | "SPS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SPS>. |
| MHRA | 'SPS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SPS> [accessed 14 February 2012] |
| Chicago | "SPS", http://www.acronymgeek.com/SPS (accessed February 14, 2012). |
| CBE/CSE | SPS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SPS. |
| Bluebook | SPS, http://www.acronymgeek.com/SPS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPS, http://www.acronymgeek.com/SPS (optional description here) (as of Feb. 14, 2012, 09:48). |
| AMA | SPS. Acronym Geek. February 14, 2012, 09:48. Available at: http://www.acronymgeek.com/SPS. Accessed February 14, 2012, 09:48. |