| APA | HPBL. (2012, February 17). In Acronym Geek. Retrieved 00:50, February 17, 2012, from http://www.acronymgeek.com/HPBL |
| MLA | "HPBL." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HPBL>. |
| MHRA | 'HPBL', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HPBL> [accessed 17 February 2012] |
| Chicago | "HPBL", http://www.acronymgeek.com/HPBL (accessed February 17, 2012). |
| CBE/CSE | HPBL [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HPBL. |
| Bluebook | HPBL, http://www.acronymgeek.com/HPBL (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HPBL, http://www.acronymgeek.com/HPBL (optional description here) (as of Feb. 17, 2012, 00:50). |
| AMA | HPBL. Acronym Geek. February 17, 2012, 00:50. Available at: http://www.acronymgeek.com/HPBL. Accessed February 17, 2012, 00:50. |