| APA | CEL. (2012, February 8). In Acronym Geek. Retrieved 12:14, February 8, 2012, from http://www.acronymgeek.com/CEL |
| MLA | "CEL." Acronym Geek. (2012). Acronym Geek. 8 Feb 2012 <http://www.acronymgeek.com/CEL>. |
| MHRA | 'CEL', Acronym Geek, 8 February 2012, <http://www.acronymgeek.com/CEL> [accessed 8 February 2012] |
| Chicago | "CEL", http://www.acronymgeek.com/CEL (accessed February 8, 2012). |
| CBE/CSE | CEL [Internet]. Acronym Geek; 2012 Feb 8 [cited 2012 Feb 8]. Available from: http://www.acronymgeek.com/CEL. |
| Bluebook | CEL, http://www.acronymgeek.com/CEL (last visited February 8, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CEL, http://www.acronymgeek.com/CEL (optional description here) (as of Feb. 8, 2012, 12:14). |
| AMA | CEL. Acronym Geek. February 8, 2012, 12:14. Available at: http://www.acronymgeek.com/CEL. Accessed February 8, 2012, 12:14. |