| APA | ECYD. (2012, February 16). In Acronym Geek. Retrieved 10:38, February 16, 2012, from http://www.acronymgeek.com/ECYD |
| MLA | "ECYD." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ECYD>. |
| MHRA | 'ECYD', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ECYD> [accessed 16 February 2012] |
| Chicago | "ECYD", http://www.acronymgeek.com/ECYD (accessed February 16, 2012). |
| CBE/CSE | ECYD [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ECYD. |
| Bluebook | ECYD, http://www.acronymgeek.com/ECYD (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ECYD, http://www.acronymgeek.com/ECYD (optional description here) (as of Feb. 16, 2012, 10:38). |
| AMA | ECYD. Acronym Geek. February 16, 2012, 10:38. Available at: http://www.acronymgeek.com/ECYD. Accessed February 16, 2012, 10:38. |