| APA | GREL. (2012, February 15). In Acronym Geek. Retrieved 16:19, February 15, 2012, from http://www.acronymgeek.com/GREL |
| MLA | "GREL." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GREL>. |
| MHRA | 'GREL', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GREL> [accessed 15 February 2012] |
| Chicago | "GREL", http://www.acronymgeek.com/GREL (accessed February 15, 2012). |
| CBE/CSE | GREL [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GREL. |
| Bluebook | GREL, http://www.acronymgeek.com/GREL (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GREL, http://www.acronymgeek.com/GREL (optional description here) (as of Feb. 15, 2012, 16:19). |
| AMA | GREL. Acronym Geek. February 15, 2012, 16:19. Available at: http://www.acronymgeek.com/GREL. Accessed February 15, 2012, 16:19. |