| APA | SGSI. (2012, February 15). In Acronym Geek. Retrieved 00:24, February 15, 2012, from http://www.acronymgeek.com/SGSI |
| MLA | "SGSI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/SGSI>. |
| MHRA | 'SGSI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/SGSI> [accessed 15 February 2012] |
| Chicago | "SGSI", http://www.acronymgeek.com/SGSI (accessed February 15, 2012). |
| CBE/CSE | SGSI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/SGSI. |
| Bluebook | SGSI, http://www.acronymgeek.com/SGSI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SGSI, http://www.acronymgeek.com/SGSI (optional description here) (as of Feb. 15, 2012, 00:24). |
| AMA | SGSI. Acronym Geek. February 15, 2012, 00:24. Available at: http://www.acronymgeek.com/SGSI. Accessed February 15, 2012, 00:24. |