| APA | HBUI. (2012, February 16). In Acronym Geek. Retrieved 22:54, February 16, 2012, from http://www.acronymgeek.com/HBUI |
| MLA | "HBUI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HBUI>. |
| MHRA | 'HBUI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HBUI> [accessed 16 February 2012] |
| Chicago | "HBUI", http://www.acronymgeek.com/HBUI (accessed February 16, 2012). |
| CBE/CSE | HBUI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HBUI. |
| Bluebook | HBUI, http://www.acronymgeek.com/HBUI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HBUI, http://www.acronymgeek.com/HBUI (optional description here) (as of Feb. 16, 2012, 22:54). |
| AMA | HBUI. Acronym Geek. February 16, 2012, 22:54. Available at: http://www.acronymgeek.com/HBUI. Accessed February 16, 2012, 22:54. |