| APA | GYDF. (2012, February 16). In Acronym Geek. Retrieved 07:48, February 16, 2012, from http://www.acronymgeek.com/GYDF |
| MLA | "GYDF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GYDF>. |
| MHRA | 'GYDF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GYDF> [accessed 16 February 2012] |
| Chicago | "GYDF", http://www.acronymgeek.com/GYDF (accessed February 16, 2012). |
| CBE/CSE | GYDF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GYDF. |
| Bluebook | GYDF, http://www.acronymgeek.com/GYDF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GYDF, http://www.acronymgeek.com/GYDF (optional description here) (as of Feb. 16, 2012, 07:48). |
| AMA | GYDF. Acronym Geek. February 16, 2012, 07:48. Available at: http://www.acronymgeek.com/GYDF. Accessed February 16, 2012, 07:48. |