| APA | SP2. (2012, February 15). In Acronym Geek. Retrieved 03:41, February 15, 2012, from http://www.acronymgeek.com/SP2 |
| MLA | "SP2." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/SP2>. |
| MHRA | 'SP2', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/SP2> [accessed 15 February 2012] |
| Chicago | "SP2", http://www.acronymgeek.com/SP2 (accessed February 15, 2012). |
| CBE/CSE | SP2 [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/SP2. |
| Bluebook | SP2, http://www.acronymgeek.com/SP2 (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SP2, http://www.acronymgeek.com/SP2 (optional description here) (as of Feb. 15, 2012, 03:41). |
| AMA | SP2. Acronym Geek. February 15, 2012, 03:41. Available at: http://www.acronymgeek.com/SP2. Accessed February 15, 2012, 03:41. |