| APA | HHGP. (2012, February 10). In Acronym Geek. Retrieved 19:10, February 10, 2012, from http://www.acronymgeek.com/HHGP |
| MLA | "HHGP." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HHGP>. |
| MHRA | 'HHGP', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HHGP> [accessed 10 February 2012] |
| Chicago | "HHGP", http://www.acronymgeek.com/HHGP (accessed February 10, 2012). |
| CBE/CSE | HHGP [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HHGP. |
| Bluebook | HHGP, http://www.acronymgeek.com/HHGP (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHGP, http://www.acronymgeek.com/HHGP (optional description here) (as of Feb. 10, 2012, 19:10). |
| AMA | HHGP. Acronym Geek. February 10, 2012, 19:10. Available at: http://www.acronymgeek.com/HHGP. Accessed February 10, 2012, 19:10. |