| APA | His Grace Duke (HGD). (2012, February 13). In Acronym Geek. Retrieved 22:30, February 13, 2012, from http://www.acronymgeek.com/HGD/His_Grace_Duke |
| MLA | "His Grace Duke (HGD)." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/HGD/His_Grace_Duke>. |
| MHRA | 'His Grace Duke (HGD)', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/HGD/His_Grace_Duke> [accessed 13 February 2012] |
| Chicago | "His Grace Duke (HGD)", http://www.acronymgeek.com/HGD/His_Grace_Duke (accessed February 13, 2012). |
| CBE/CSE | His Grace Duke (HGD) [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/HGD/His_Grace_Duke. |
| Bluebook | His Grace Duke (HGD), http://www.acronymgeek.com/HGD/His_Grace_Duke (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, His Grace Duke (HGD), http://www.acronymgeek.com/HGD/His_Grace_Duke (optional description here) (as of Feb. 13, 2012, 22:30). |
| AMA | His Grace Duke (HGD). Acronym Geek. February 13, 2012, 22:30. Available at: http://www.acronymgeek.com/HGD/His_Grace_Duke. Accessed February 13, 2012, 22:30. |