| APA | GUL. (2012, February 14). In Acronym Geek. Retrieved 19:33, February 14, 2012, from http://www.acronymgeek.com/GUL |
| MLA | "GUL." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GUL>. |
| MHRA | 'GUL', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GUL> [accessed 14 February 2012] |
| Chicago | "GUL", http://www.acronymgeek.com/GUL (accessed February 14, 2012). |
| CBE/CSE | GUL [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GUL. |
| Bluebook | GUL, http://www.acronymgeek.com/GUL (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GUL, http://www.acronymgeek.com/GUL (optional description here) (as of Feb. 14, 2012, 19:33). |
| AMA | GUL. Acronym Geek. February 14, 2012, 19:33. Available at: http://www.acronymgeek.com/GUL. Accessed February 14, 2012, 19:33. |