| APA | GUG. (2012, February 14). In Acronym Geek. Retrieved 12:11, February 14, 2012, from http://www.acronymgeek.com/GUG |
| MLA | "GUG." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GUG>. |
| MHRA | 'GUG', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GUG> [accessed 14 February 2012] |
| Chicago | "GUG", http://www.acronymgeek.com/GUG (accessed February 14, 2012). |
| CBE/CSE | GUG [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GUG. |
| Bluebook | GUG, http://www.acronymgeek.com/GUG (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GUG, http://www.acronymgeek.com/GUG (optional description here) (as of Feb. 14, 2012, 12:11). |
| AMA | GUG. Acronym Geek. February 14, 2012, 12:11. Available at: http://www.acronymgeek.com/GUG. Accessed February 14, 2012, 12:11. |