| APA | GULL. (2012, February 17). In Acronym Geek. Retrieved 05:30, February 17, 2012, from http://www.acronymgeek.com/GULL |
| MLA | "GULL." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/GULL>. |
| MHRA | 'GULL', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/GULL> [accessed 17 February 2012] |
| Chicago | "GULL", http://www.acronymgeek.com/GULL (accessed February 17, 2012). |
| CBE/CSE | GULL [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/GULL. |
| Bluebook | GULL, http://www.acronymgeek.com/GULL (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GULL, http://www.acronymgeek.com/GULL (optional description here) (as of Feb. 17, 2012, 05:30). |
| AMA | GULL. Acronym Geek. February 17, 2012, 05:30. Available at: http://www.acronymgeek.com/GULL. Accessed February 17, 2012, 05:30. |