| APA | GS-1. (2012, February 11). In Acronym Geek. Retrieved 21:28, February 11, 2012, from http://www.acronymgeek.com/GS-1 |
| MLA | "GS-1." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/GS-1>. |
| MHRA | 'GS-1', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/GS-1> [accessed 11 February 2012] |
| Chicago | "GS-1", http://www.acronymgeek.com/GS-1 (accessed February 11, 2012). |
| CBE/CSE | GS-1 [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/GS-1. |
| Bluebook | GS-1, http://www.acronymgeek.com/GS-1 (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GS-1, http://www.acronymgeek.com/GS-1 (optional description here) (as of Feb. 11, 2012, 21:28). |
| AMA | GS-1. Acronym Geek. February 11, 2012, 21:28. Available at: http://www.acronymgeek.com/GS-1. Accessed February 11, 2012, 21:28. |