| APA | GRAY. (2012, February 16). In Acronym Geek. Retrieved 08:26, February 16, 2012, from http://www.acronymgeek.com/GRAY |
| MLA | "GRAY." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GRAY>. |
| MHRA | 'GRAY', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GRAY> [accessed 16 February 2012] |
| Chicago | "GRAY", http://www.acronymgeek.com/GRAY (accessed February 16, 2012). |
| CBE/CSE | GRAY [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GRAY. |
| Bluebook | GRAY, http://www.acronymgeek.com/GRAY (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GRAY, http://www.acronymgeek.com/GRAY (optional description here) (as of Feb. 16, 2012, 08:26). |
| AMA | GRAY. Acronym Geek. February 16, 2012, 08:26. Available at: http://www.acronymgeek.com/GRAY. Accessed February 16, 2012, 08:26. |