| APA | HB/HA. (2012, February 10). In Acronym Geek. Retrieved 10:03, February 10, 2012, from http://www.acronymgeek.com/HB/HA |
| MLA | "HB/HA." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HB/HA>. |
| MHRA | 'HB/HA', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HB/HA> [accessed 10 February 2012] |
| Chicago | "HB/HA", http://www.acronymgeek.com/HB/HA (accessed February 10, 2012). |
| CBE/CSE | HB/HA [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HB/HA. |
| Bluebook | HB/HA, http://www.acronymgeek.com/HB/HA (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HB/HA, http://www.acronymgeek.com/HB/HA (optional description here) (as of Feb. 10, 2012, 10:03). |
| AMA | HB/HA. Acronym Geek. February 10, 2012, 10:03. Available at: http://www.acronymgeek.com/HB/HA. Accessed February 10, 2012, 10:03. |