| APA | ECG. (2012, February 9). In Acronym Geek. Retrieved 13:40, February 9, 2012, from http://www.acronymgeek.com/ECG |
| MLA | "ECG." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/ECG>. |
| MHRA | 'ECG', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/ECG> [accessed 9 February 2012] |
| Chicago | "ECG", http://www.acronymgeek.com/ECG (accessed February 9, 2012). |
| CBE/CSE | ECG [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/ECG. |
| Bluebook | ECG, http://www.acronymgeek.com/ECG (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ECG, http://www.acronymgeek.com/ECG (optional description here) (as of Feb. 9, 2012, 13:40). |
| AMA | ECG. Acronym Geek. February 9, 2012, 13:40. Available at: http://www.acronymgeek.com/ECG. Accessed February 9, 2012, 13:40. |