| APA | CQEN. (2012, February 17). In Acronym Geek. Retrieved 05:38, February 17, 2012, from http://www.acronymgeek.com/CQEN |
| MLA | "CQEN." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/CQEN>. |
| MHRA | 'CQEN', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/CQEN> [accessed 17 February 2012] |
| Chicago | "CQEN", http://www.acronymgeek.com/CQEN (accessed February 17, 2012). |
| CBE/CSE | CQEN [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/CQEN. |
| Bluebook | CQEN, http://www.acronymgeek.com/CQEN (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CQEN, http://www.acronymgeek.com/CQEN (optional description here) (as of Feb. 17, 2012, 05:38). |
| AMA | CQEN. Acronym Geek. February 17, 2012, 05:38. Available at: http://www.acronymgeek.com/CQEN. Accessed February 17, 2012, 05:38. |