| APA | COE. (2012, February 9). In Acronym Geek. Retrieved 20:36, February 9, 2012, from http://www.acronymgeek.com/COE |
| MLA | "COE." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/COE>. |
| MHRA | 'COE', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/COE> [accessed 9 February 2012] |
| Chicago | "COE", http://www.acronymgeek.com/COE (accessed February 9, 2012). |
| CBE/CSE | COE [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/COE. |
| Bluebook | COE, http://www.acronymgeek.com/COE (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, COE, http://www.acronymgeek.com/COE (optional description here) (as of Feb. 9, 2012, 20:36). |
| AMA | COE. Acronym Geek. February 9, 2012, 20:36. Available at: http://www.acronymgeek.com/COE. Accessed February 9, 2012, 20:36. |