| APA | GYS. (2012, February 11). In Acronym Geek. Retrieved 23:21, February 11, 2012, from http://www.acronymgeek.com/GYS |
| MLA | "GYS." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/GYS>. |
| MHRA | 'GYS', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/GYS> [accessed 11 February 2012] |
| Chicago | "GYS", http://www.acronymgeek.com/GYS (accessed February 11, 2012). |
| CBE/CSE | GYS [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/GYS. |
| Bluebook | GYS, http://www.acronymgeek.com/GYS (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GYS, http://www.acronymgeek.com/GYS (optional description here) (as of Feb. 11, 2012, 23:21). |
| AMA | GYS. Acronym Geek. February 11, 2012, 23:21. Available at: http://www.acronymgeek.com/GYS. Accessed February 11, 2012, 23:21. |