| APA | SP-I. (2012, February 12). In Acronym Geek. Retrieved 07:22, February 12, 2012, from http://www.acronymgeek.com/SP-I |
| MLA | "SP-I." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SP-I>. |
| MHRA | 'SP-I', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SP-I> [accessed 12 February 2012] |
| Chicago | "SP-I", http://www.acronymgeek.com/SP-I (accessed February 12, 2012). |
| CBE/CSE | SP-I [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SP-I. |
| Bluebook | SP-I, http://www.acronymgeek.com/SP-I (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SP-I, http://www.acronymgeek.com/SP-I (optional description here) (as of Feb. 12, 2012, 07:22). |
| AMA | SP-I. Acronym Geek. February 12, 2012, 07:22. Available at: http://www.acronymgeek.com/SP-I. Accessed February 12, 2012, 07:22. |