| APA | SP NO. (2012, February 10). In Acronym Geek. Retrieved 08:41, February 10, 2012, from http://www.acronymgeek.com/SP NO |
| MLA | "SP NO." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/SP NO>. |
| MHRA | 'SP NO', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/SP NO> [accessed 10 February 2012] |
| Chicago | "SP NO", http://www.acronymgeek.com/SP NO (accessed February 10, 2012). |
| CBE/CSE | SP NO [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/SP NO. |
| Bluebook | SP NO, http://www.acronymgeek.com/SP NO (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SP NO, http://www.acronymgeek.com/SP NO (optional description here) (as of Feb. 10, 2012, 08:41). |
| AMA | SP NO. Acronym Geek. February 10, 2012, 08:41. Available at: http://www.acronymgeek.com/SP NO. Accessed February 10, 2012, 08:41. |