| APA | HBPI. (2012, February 14). In Acronym Geek. Retrieved 19:56, February 14, 2012, from http://www.acronymgeek.com/HBPI |
| MLA | "HBPI." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HBPI>. |
| MHRA | 'HBPI', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HBPI> [accessed 14 February 2012] |
| Chicago | "HBPI", http://www.acronymgeek.com/HBPI (accessed February 14, 2012). |
| CBE/CSE | HBPI [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HBPI. |
| Bluebook | HBPI, http://www.acronymgeek.com/HBPI (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HBPI, http://www.acronymgeek.com/HBPI (optional description here) (as of Feb. 14, 2012, 19:56). |
| AMA | HBPI. Acronym Geek. February 14, 2012, 19:56. Available at: http://www.acronymgeek.com/HBPI. Accessed February 14, 2012, 19:56. |