| APA | GFDL. (2012, February 10). In Acronym Geek. Retrieved 17:33, February 10, 2012, from http://www.acronymgeek.com/GFDL |
| MLA | "GFDL." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/GFDL>. |
| MHRA | 'GFDL', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/GFDL> [accessed 10 February 2012] |
| Chicago | "GFDL", http://www.acronymgeek.com/GFDL (accessed February 10, 2012). |
| CBE/CSE | GFDL [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/GFDL. |
| Bluebook | GFDL, http://www.acronymgeek.com/GFDL (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GFDL, http://www.acronymgeek.com/GFDL (optional description here) (as of Feb. 10, 2012, 17:33). |
| AMA | GFDL. Acronym Geek. February 10, 2012, 17:33. Available at: http://www.acronymgeek.com/GFDL. Accessed February 10, 2012, 17:33. |