| APA | HGTK. (2012, February 15). In Acronym Geek. Retrieved 22:21, February 15, 2012, from http://www.acronymgeek.com/HGTK |
| MLA | "HGTK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HGTK>. |
| MHRA | 'HGTK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HGTK> [accessed 15 February 2012] |
| Chicago | "HGTK", http://www.acronymgeek.com/HGTK (accessed February 15, 2012). |
| CBE/CSE | HGTK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HGTK. |
| Bluebook | HGTK, http://www.acronymgeek.com/HGTK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGTK, http://www.acronymgeek.com/HGTK (optional description here) (as of Feb. 15, 2012, 22:21). |
| AMA | HGTK. Acronym Geek. February 15, 2012, 22:21. Available at: http://www.acronymgeek.com/HGTK. Accessed February 15, 2012, 22:21. |