| APA | S-P. (2012, February 14). In Acronym Geek. Retrieved 12:05, February 14, 2012, from http://www.acronymgeek.com/S-P |
| MLA | "S-P." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/S-P>. |
| MHRA | 'S-P', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/S-P> [accessed 14 February 2012] |
| Chicago | "S-P", http://www.acronymgeek.com/S-P (accessed February 14, 2012). |
| CBE/CSE | S-P [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/S-P. |
| Bluebook | S-P, http://www.acronymgeek.com/S-P (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, S-P, http://www.acronymgeek.com/S-P (optional description here) (as of Feb. 14, 2012, 12:05). |
| AMA | S-P. Acronym Geek. February 14, 2012, 12:05. Available at: http://www.acronymgeek.com/S-P. Accessed February 14, 2012, 12:05. |