| APA | GHG. (2012, February 10). In Acronym Geek. Retrieved 17:11, February 10, 2012, from http://www.acronymgeek.com/GHG |
| MLA | "GHG." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/GHG>. |
| MHRA | 'GHG', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/GHG> [accessed 10 February 2012] |
| Chicago | "GHG", http://www.acronymgeek.com/GHG (accessed February 10, 2012). |
| CBE/CSE | GHG [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/GHG. |
| Bluebook | GHG, http://www.acronymgeek.com/GHG (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GHG, http://www.acronymgeek.com/GHG (optional description here) (as of Feb. 10, 2012, 17:11). |
| AMA | GHG. Acronym Geek. February 10, 2012, 17:11. Available at: http://www.acronymgeek.com/GHG. Accessed February 10, 2012, 17:11. |