| APA | SP'S. (2012, February 12). In Acronym Geek. Retrieved 15:27, February 12, 2012, from http://www.acronymgeek.com/SP'S |
| MLA | "SP'S." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SP'S>. |
| MHRA | 'SP'S', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SP'S> [accessed 12 February 2012] |
| Chicago | "SP'S", http://www.acronymgeek.com/SP'S (accessed February 12, 2012). |
| CBE/CSE | SP'S [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SP'S. |
| Bluebook | SP'S, http://www.acronymgeek.com/SP'S (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SP'S, http://www.acronymgeek.com/SP'S (optional description here) (as of Feb. 12, 2012, 15:27). |
| AMA | SP'S. Acronym Geek. February 12, 2012, 15:27. Available at: http://www.acronymgeek.com/SP'S. Accessed February 12, 2012, 15:27. |