| APA | HBOE. (2012, February 15). In Acronym Geek. Retrieved 12:22, February 15, 2012, from http://www.acronymgeek.com/HBOE |
| MLA | "HBOE." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HBOE>. |
| MHRA | 'HBOE', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HBOE> [accessed 15 February 2012] |
| Chicago | "HBOE", http://www.acronymgeek.com/HBOE (accessed February 15, 2012). |
| CBE/CSE | HBOE [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HBOE. |
| Bluebook | HBOE, http://www.acronymgeek.com/HBOE (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HBOE, http://www.acronymgeek.com/HBOE (optional description here) (as of Feb. 15, 2012, 12:22). |
| AMA | HBOE. Acronym Geek. February 15, 2012, 12:22. Available at: http://www.acronymgeek.com/HBOE. Accessed February 15, 2012, 12:22. |