| APA | 4GLS. (2012, February 17). In Acronym Geek. Retrieved 02:41, February 17, 2012, from http://www.acronymgeek.com/4GLS |
| MLA | "4GLS." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/4GLS>. |
| MHRA | '4GLS', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/4GLS> [accessed 17 February 2012] |
| Chicago | "4GLS", http://www.acronymgeek.com/4GLS (accessed February 17, 2012). |
| CBE/CSE | 4GLS [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/4GLS. |
| Bluebook | 4GLS, http://www.acronymgeek.com/4GLS (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 4GLS, http://www.acronymgeek.com/4GLS (optional description here) (as of Feb. 17, 2012, 02:41). |
| AMA | 4GLS. Acronym Geek. February 17, 2012, 02:41. Available at: http://www.acronymgeek.com/4GLS. Accessed February 17, 2012, 02:41. |