| APA | SP GR. (2012, February 12). In Acronym Geek. Retrieved 16:01, February 12, 2012, from http://www.acronymgeek.com/SP GR |
| MLA | "SP GR." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SP GR>. |
| MHRA | 'SP GR', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SP GR> [accessed 12 February 2012] |
| Chicago | "SP GR", http://www.acronymgeek.com/SP GR (accessed February 12, 2012). |
| CBE/CSE | SP GR [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SP GR. |
| Bluebook | SP GR, http://www.acronymgeek.com/SP GR (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SP GR, http://www.acronymgeek.com/SP GR (optional description here) (as of Feb. 12, 2012, 16:01). |
| AMA | SP GR. Acronym Geek. February 12, 2012, 16:01. Available at: http://www.acronymgeek.com/SP GR. Accessed February 12, 2012, 16:01. |