| APA | SNPI. (2012, February 17). In Acronym Geek. Retrieved 06:35, February 17, 2012, from http://www.acronymgeek.com/SNPI |
| MLA | "SNPI." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/SNPI>. |
| MHRA | 'SNPI', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/SNPI> [accessed 17 February 2012] |
| Chicago | "SNPI", http://www.acronymgeek.com/SNPI (accessed February 17, 2012). |
| CBE/CSE | SNPI [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/SNPI. |
| Bluebook | SNPI, http://www.acronymgeek.com/SNPI (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SNPI, http://www.acronymgeek.com/SNPI (optional description here) (as of Feb. 17, 2012, 06:35). |
| AMA | SNPI. Acronym Geek. February 17, 2012, 06:35. Available at: http://www.acronymgeek.com/SNPI. Accessed February 17, 2012, 06:35. |