| APA | SPU. (2012, February 14). In Acronym Geek. Retrieved 07:08, February 14, 2012, from http://www.acronymgeek.com/SPU |
| MLA | "SPU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SPU>. |
| MHRA | 'SPU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SPU> [accessed 14 February 2012] |
| Chicago | "SPU", http://www.acronymgeek.com/SPU (accessed February 14, 2012). |
| CBE/CSE | SPU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SPU. |
| Bluebook | SPU, http://www.acronymgeek.com/SPU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPU, http://www.acronymgeek.com/SPU (optional description here) (as of Feb. 14, 2012, 07:08). |
| AMA | SPU. Acronym Geek. February 14, 2012, 07:08. Available at: http://www.acronymgeek.com/SPU. Accessed February 14, 2012, 07:08. |