| APA | HGC. (2012, February 15). In Acronym Geek. Retrieved 03:15, February 15, 2012, from http://www.acronymgeek.com/HGC |
| MLA | "HGC." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HGC>. |
| MHRA | 'HGC', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HGC> [accessed 15 February 2012] |
| Chicago | "HGC", http://www.acronymgeek.com/HGC (accessed February 15, 2012). |
| CBE/CSE | HGC [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HGC. |
| Bluebook | HGC, http://www.acronymgeek.com/HGC (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGC, http://www.acronymgeek.com/HGC (optional description here) (as of Feb. 15, 2012, 03:15). |
| AMA | HGC. Acronym Geek. February 15, 2012, 03:15. Available at: http://www.acronymgeek.com/HGC. Accessed February 15, 2012, 03:15. |