| APA | CE. (2012, February 14). In Acronym Geek. Retrieved 06:54, February 14, 2012, from http://www.acronymgeek.com/CE |
| MLA | "CE." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/CE>. |
| MHRA | 'CE', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/CE> [accessed 14 February 2012] |
| Chicago | "CE", http://www.acronymgeek.com/CE (accessed February 14, 2012). |
| CBE/CSE | CE [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/CE. |
| Bluebook | CE, http://www.acronymgeek.com/CE (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CE, http://www.acronymgeek.com/CE (optional description here) (as of Feb. 14, 2012, 06:54). |
| AMA | CE. Acronym Geek. February 14, 2012, 06:54. Available at: http://www.acronymgeek.com/CE. Accessed February 14, 2012, 06:54. |