| APA | SPNN. (2012, February 15). In Acronym Geek. Retrieved 01:52, February 15, 2012, from http://www.acronymgeek.com/SPNN |
| MLA | "SPNN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/SPNN>. |
| MHRA | 'SPNN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/SPNN> [accessed 15 February 2012] |
| Chicago | "SPNN", http://www.acronymgeek.com/SPNN (accessed February 15, 2012). |
| CBE/CSE | SPNN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/SPNN. |
| Bluebook | SPNN, http://www.acronymgeek.com/SPNN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPNN, http://www.acronymgeek.com/SPNN (optional description here) (as of Feb. 15, 2012, 01:52). |
| AMA | SPNN. Acronym Geek. February 15, 2012, 01:52. Available at: http://www.acronymgeek.com/SPNN. Accessed February 15, 2012, 01:52. |