| APA | GRYS. (2012, February 15). In Acronym Geek. Retrieved 20:16, February 15, 2012, from http://www.acronymgeek.com/GRYS |
| MLA | "GRYS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GRYS>. |
| MHRA | 'GRYS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GRYS> [accessed 15 February 2012] |
| Chicago | "GRYS", http://www.acronymgeek.com/GRYS (accessed February 15, 2012). |
| CBE/CSE | GRYS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GRYS. |
| Bluebook | GRYS, http://www.acronymgeek.com/GRYS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GRYS, http://www.acronymgeek.com/GRYS (optional description here) (as of Feb. 15, 2012, 20:16). |
| AMA | GRYS. Acronym Geek. February 15, 2012, 20:16. Available at: http://www.acronymgeek.com/GRYS. Accessed February 15, 2012, 20:16. |