| APA | SPE. (2012, February 9). In Acronym Geek. Retrieved 20:57, February 9, 2012, from http://www.acronymgeek.com/SPE |
| MLA | "SPE." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/SPE>. |
| MHRA | 'SPE', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/SPE> [accessed 9 February 2012] |
| Chicago | "SPE", http://www.acronymgeek.com/SPE (accessed February 9, 2012). |
| CBE/CSE | SPE [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/SPE. |
| Bluebook | SPE, http://www.acronymgeek.com/SPE (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPE, http://www.acronymgeek.com/SPE (optional description here) (as of Feb. 9, 2012, 20:57). |
| AMA | SPE. Acronym Geek. February 9, 2012, 20:57. Available at: http://www.acronymgeek.com/SPE. Accessed February 9, 2012, 20:57. |