| APA | HGRP. (2012, February 16). In Acronym Geek. Retrieved 23:40, February 16, 2012, from http://www.acronymgeek.com/HGRP |
| MLA | "HGRP." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HGRP>. |
| MHRA | 'HGRP', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HGRP> [accessed 16 February 2012] |
| Chicago | "HGRP", http://www.acronymgeek.com/HGRP (accessed February 16, 2012). |
| CBE/CSE | HGRP [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HGRP. |
| Bluebook | HGRP, http://www.acronymgeek.com/HGRP (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGRP, http://www.acronymgeek.com/HGRP (optional description here) (as of Feb. 16, 2012, 23:40). |
| AMA | HGRP. Acronym Geek. February 16, 2012, 23:40. Available at: http://www.acronymgeek.com/HGRP. Accessed February 16, 2012, 23:40. |