| APA | GS. (2012, February 9). In Acronym Geek. Retrieved 13:44, February 9, 2012, from http://www.acronymgeek.com/GS |
| MLA | "GS." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/GS>. |
| MHRA | 'GS', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/GS> [accessed 9 February 2012] |
| Chicago | "GS", http://www.acronymgeek.com/GS (accessed February 9, 2012). |
| CBE/CSE | GS [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/GS. |
| Bluebook | GS, http://www.acronymgeek.com/GS (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GS, http://www.acronymgeek.com/GS (optional description here) (as of Feb. 9, 2012, 13:44). |
| AMA | GS. Acronym Geek. February 9, 2012, 13:44. Available at: http://www.acronymgeek.com/GS. Accessed February 9, 2012, 13:44. |