| APA | SP. (2012, February 14). In Acronym Geek. Retrieved 06:55, February 14, 2012, from http://www.acronymgeek.com/SP |
| MLA | "SP." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SP>. |
| MHRA | 'SP', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SP> [accessed 14 February 2012] |
| Chicago | "SP", http://www.acronymgeek.com/SP (accessed February 14, 2012). |
| CBE/CSE | SP [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SP. |
| Bluebook | SP, http://www.acronymgeek.com/SP (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SP, http://www.acronymgeek.com/SP (optional description here) (as of Feb. 14, 2012, 06:55). |
| AMA | SP. Acronym Geek. February 14, 2012, 06:55. Available at: http://www.acronymgeek.com/SP. Accessed February 14, 2012, 06:55. |