| APA | HHYG. (2012, February 15). In Acronym Geek. Retrieved 10:56, February 15, 2012, from http://www.acronymgeek.com/HHYG |
| MLA | "HHYG." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HHYG>. |
| MHRA | 'HHYG', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HHYG> [accessed 15 February 2012] |
| Chicago | "HHYG", http://www.acronymgeek.com/HHYG (accessed February 15, 2012). |
| CBE/CSE | HHYG [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HHYG. |
| Bluebook | HHYG, http://www.acronymgeek.com/HHYG (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHYG, http://www.acronymgeek.com/HHYG (optional description here) (as of Feb. 15, 2012, 10:56). |
| AMA | HHYG. Acronym Geek. February 15, 2012, 10:56. Available at: http://www.acronymgeek.com/HHYG. Accessed February 15, 2012, 10:56. |