| APA | COEU. (2012, February 14). In Acronym Geek. Retrieved 13:19, February 14, 2012, from http://www.acronymgeek.com/COEU |
| MLA | "COEU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/COEU>. |
| MHRA | 'COEU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/COEU> [accessed 14 February 2012] |
| Chicago | "COEU", http://www.acronymgeek.com/COEU (accessed February 14, 2012). |
| CBE/CSE | COEU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/COEU. |
| Bluebook | COEU, http://www.acronymgeek.com/COEU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, COEU, http://www.acronymgeek.com/COEU (optional description here) (as of Feb. 14, 2012, 13:19). |
| AMA | COEU. Acronym Geek. February 14, 2012, 13:19. Available at: http://www.acronymgeek.com/COEU. Accessed February 14, 2012, 13:19. |