| APA | TREL. (2012, February 16). In Acronym Geek. Retrieved 00:10, February 16, 2012, from http://www.acronymgeek.com/TREL |
| MLA | "TREL." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/TREL>. |
| MHRA | 'TREL', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/TREL> [accessed 16 February 2012] |
| Chicago | "TREL", http://www.acronymgeek.com/TREL (accessed February 16, 2012). |
| CBE/CSE | TREL [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/TREL. |
| Bluebook | TREL, http://www.acronymgeek.com/TREL (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TREL, http://www.acronymgeek.com/TREL (optional description here) (as of Feb. 16, 2012, 00:10). |
| AMA | TREL. Acronym Geek. February 16, 2012, 00:10. Available at: http://www.acronymgeek.com/TREL. Accessed February 16, 2012, 00:10. |