| APA | GSI. (2012, February 10). In Acronym Geek. Retrieved 16:45, February 10, 2012, from http://www.acronymgeek.com/GSI |
| MLA | "GSI." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/GSI>. |
| MHRA | 'GSI', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/GSI> [accessed 10 February 2012] |
| Chicago | "GSI", http://www.acronymgeek.com/GSI (accessed February 10, 2012). |
| CBE/CSE | GSI [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/GSI. |
| Bluebook | GSI, http://www.acronymgeek.com/GSI (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GSI, http://www.acronymgeek.com/GSI (optional description here) (as of Feb. 10, 2012, 16:45). |
| AMA | GSI. Acronym Geek. February 10, 2012, 16:45. Available at: http://www.acronymgeek.com/GSI. Accessed February 10, 2012, 16:45. |