| APA | SPPN. (2012, February 12). In Acronym Geek. Retrieved 12:39, February 12, 2012, from http://www.acronymgeek.com/SPPN |
| MLA | "SPPN." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SPPN>. |
| MHRA | 'SPPN', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SPPN> [accessed 12 February 2012] |
| Chicago | "SPPN", http://www.acronymgeek.com/SPPN (accessed February 12, 2012). |
| CBE/CSE | SPPN [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SPPN. |
| Bluebook | SPPN, http://www.acronymgeek.com/SPPN (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPPN, http://www.acronymgeek.com/SPPN (optional description here) (as of Feb. 12, 2012, 12:39). |
| AMA | SPPN. Acronym Geek. February 12, 2012, 12:39. Available at: http://www.acronymgeek.com/SPPN. Accessed February 12, 2012, 12:39. |