| APA | ERD. (2012, February 13). In Acronym Geek. Retrieved 23:28, February 13, 2012, from http://www.acronymgeek.com/ERD |
| MLA | "ERD." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/ERD>. |
| MHRA | 'ERD', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/ERD> [accessed 13 February 2012] |
| Chicago | "ERD", http://www.acronymgeek.com/ERD (accessed February 13, 2012). |
| CBE/CSE | ERD [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/ERD. |
| Bluebook | ERD, http://www.acronymgeek.com/ERD (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ERD, http://www.acronymgeek.com/ERD (optional description here) (as of Feb. 13, 2012, 23:28). |
| AMA | ERD. Acronym Geek. February 13, 2012, 23:28. Available at: http://www.acronymgeek.com/ERD. Accessed February 13, 2012, 23:28. |