| APA | HBMO. (2012, February 15). In Acronym Geek. Retrieved 09:06, February 15, 2012, from http://www.acronymgeek.com/HBMO |
| MLA | "HBMO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HBMO>. |
| MHRA | 'HBMO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HBMO> [accessed 15 February 2012] |
| Chicago | "HBMO", http://www.acronymgeek.com/HBMO (accessed February 15, 2012). |
| CBE/CSE | HBMO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HBMO. |
| Bluebook | HBMO, http://www.acronymgeek.com/HBMO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HBMO, http://www.acronymgeek.com/HBMO (optional description here) (as of Feb. 15, 2012, 09:06). |
| AMA | HBMO. Acronym Geek. February 15, 2012, 09:06. Available at: http://www.acronymgeek.com/HBMO. Accessed February 15, 2012, 09:06. |