| APA | EFHO. (2012, February 16). In Acronym Geek. Retrieved 17:00, February 16, 2012, from http://www.acronymgeek.com/EFHO |
| MLA | "EFHO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/EFHO>. |
| MHRA | 'EFHO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/EFHO> [accessed 16 February 2012] |
| Chicago | "EFHO", http://www.acronymgeek.com/EFHO (accessed February 16, 2012). |
| CBE/CSE | EFHO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/EFHO. |
| Bluebook | EFHO, http://www.acronymgeek.com/EFHO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EFHO, http://www.acronymgeek.com/EFHO (optional description here) (as of Feb. 16, 2012, 17:00). |
| AMA | EFHO. Acronym Geek. February 16, 2012, 17:00. Available at: http://www.acronymgeek.com/EFHO. Accessed February 16, 2012, 17:00. |