| APA | HPBI. (2012, February 15). In Acronym Geek. Retrieved 09:33, February 15, 2012, from http://www.acronymgeek.com/HPBI |
| MLA | "HPBI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HPBI>. |
| MHRA | 'HPBI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HPBI> [accessed 15 February 2012] |
| Chicago | "HPBI", http://www.acronymgeek.com/HPBI (accessed February 15, 2012). |
| CBE/CSE | HPBI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HPBI. |
| Bluebook | HPBI, http://www.acronymgeek.com/HPBI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HPBI, http://www.acronymgeek.com/HPBI (optional description here) (as of Feb. 15, 2012, 09:33). |
| AMA | HPBI. Acronym Geek. February 15, 2012, 09:33. Available at: http://www.acronymgeek.com/HPBI. Accessed February 15, 2012, 09:33. |