| APA | ECU. (2012, February 15). In Acronym Geek. Retrieved 03:22, February 15, 2012, from http://www.acronymgeek.com/ECU |
| MLA | "ECU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ECU>. |
| MHRA | 'ECU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ECU> [accessed 15 February 2012] |
| Chicago | "ECU", http://www.acronymgeek.com/ECU (accessed February 15, 2012). |
| CBE/CSE | ECU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ECU. |
| Bluebook | ECU, http://www.acronymgeek.com/ECU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ECU, http://www.acronymgeek.com/ECU (optional description here) (as of Feb. 15, 2012, 03:22). |
| AMA | ECU. Acronym Geek. February 15, 2012, 03:22. Available at: http://www.acronymgeek.com/ECU. Accessed February 15, 2012, 03:22. |