| APA | SPPIL. (2012, February 12). In Acronym Geek. Retrieved 14:53, February 12, 2012, from http://www.acronymgeek.com/SPPIL |
| MLA | "SPPIL." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SPPIL>. |
| MHRA | 'SPPIL', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SPPIL> [accessed 12 February 2012] |
| Chicago | "SPPIL", http://www.acronymgeek.com/SPPIL (accessed February 12, 2012). |
| CBE/CSE | SPPIL [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SPPIL. |
| Bluebook | SPPIL, http://www.acronymgeek.com/SPPIL (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPPIL, http://www.acronymgeek.com/SPPIL (optional description here) (as of Feb. 12, 2012, 14:53). |
| AMA | SPPIL. Acronym Geek. February 12, 2012, 14:53. Available at: http://www.acronymgeek.com/SPPIL. Accessed February 12, 2012, 14:53. |