| APA | SPP. (2012, February 9). In Acronym Geek. Retrieved 17:00, February 9, 2012, from http://www.acronymgeek.com/SPP |
| MLA | "SPP." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/SPP>. |
| MHRA | 'SPP', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/SPP> [accessed 9 February 2012] |
| Chicago | "SPP", http://www.acronymgeek.com/SPP (accessed February 9, 2012). |
| CBE/CSE | SPP [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/SPP. |
| Bluebook | SPP, http://www.acronymgeek.com/SPP (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPP, http://www.acronymgeek.com/SPP (optional description here) (as of Feb. 9, 2012, 17:00). |
| AMA | SPP. Acronym Geek. February 9, 2012, 17:00. Available at: http://www.acronymgeek.com/SPP. Accessed February 9, 2012, 17:00. |