| APA | EC-IOA. (2012, February 12). In Acronym Geek. Retrieved 08:53, February 12, 2012, from http://www.acronymgeek.com/EC-IOA |
| MLA | "EC-IOA." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/EC-IOA>. |
| MHRA | 'EC-IOA', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/EC-IOA> [accessed 12 February 2012] |
| Chicago | "EC-IOA", http://www.acronymgeek.com/EC-IOA (accessed February 12, 2012). |
| CBE/CSE | EC-IOA [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/EC-IOA. |
| Bluebook | EC-IOA, http://www.acronymgeek.com/EC-IOA (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EC-IOA, http://www.acronymgeek.com/EC-IOA (optional description here) (as of Feb. 12, 2012, 08:53). |
| AMA | EC-IOA. Acronym Geek. February 12, 2012, 08:53. Available at: http://www.acronymgeek.com/EC-IOA. Accessed February 12, 2012, 08:53. |