| APA | GUI. (2012, February 8). In Acronym Geek. Retrieved 20:04, February 8, 2012, from http://www.acronymgeek.com/GUI |
| MLA | "GUI." Acronym Geek. (2012). Acronym Geek. 8 Feb 2012 <http://www.acronymgeek.com/GUI>. |
| MHRA | 'GUI', Acronym Geek, 8 February 2012, <http://www.acronymgeek.com/GUI> [accessed 8 February 2012] |
| Chicago | "GUI", http://www.acronymgeek.com/GUI (accessed February 8, 2012). |
| CBE/CSE | GUI [Internet]. Acronym Geek; 2012 Feb 8 [cited 2012 Feb 8]. Available from: http://www.acronymgeek.com/GUI. |
| Bluebook | GUI, http://www.acronymgeek.com/GUI (last visited February 8, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GUI, http://www.acronymgeek.com/GUI (optional description here) (as of Feb. 8, 2012, 20:04). |
| AMA | GUI. Acronym Geek. February 8, 2012, 20:04. Available at: http://www.acronymgeek.com/GUI. Accessed February 8, 2012, 20:04. |