| APA | GACS. (2012, February 17). In Acronym Geek. Retrieved 02:26, February 17, 2012, from http://www.acronymgeek.com/GACS |
| MLA | "GACS." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/GACS>. |
| MHRA | 'GACS', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/GACS> [accessed 17 February 2012] |
| Chicago | "GACS", http://www.acronymgeek.com/GACS (accessed February 17, 2012). |
| CBE/CSE | GACS [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/GACS. |
| Bluebook | GACS, http://www.acronymgeek.com/GACS (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GACS, http://www.acronymgeek.com/GACS (optional description here) (as of Feb. 17, 2012, 02:26). |
| AMA | GACS. Acronym Geek. February 17, 2012, 02:26. Available at: http://www.acronymgeek.com/GACS. Accessed February 17, 2012, 02:26. |