| APA | GS-I. (2012, February 12). In Acronym Geek. Retrieved 05:36, February 12, 2012, from http://www.acronymgeek.com/GS-I |
| MLA | "GS-I." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/GS-I>. |
| MHRA | 'GS-I', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/GS-I> [accessed 12 February 2012] |
| Chicago | "GS-I", http://www.acronymgeek.com/GS-I (accessed February 12, 2012). |
| CBE/CSE | GS-I [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/GS-I. |
| Bluebook | GS-I, http://www.acronymgeek.com/GS-I (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GS-I, http://www.acronymgeek.com/GS-I (optional description here) (as of Feb. 12, 2012, 05:36). |
| AMA | GS-I. Acronym Geek. February 12, 2012, 05:36. Available at: http://www.acronymgeek.com/GS-I. Accessed February 12, 2012, 05:36. |