| APA | SGD. (2012, February 9). In Acronym Geek. Retrieved 21:06, February 9, 2012, from http://www.acronymgeek.com/SGD |
| MLA | "SGD." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/SGD>. |
| MHRA | 'SGD', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/SGD> [accessed 9 February 2012] |
| Chicago | "SGD", http://www.acronymgeek.com/SGD (accessed February 9, 2012). |
| CBE/CSE | SGD [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/SGD. |
| Bluebook | SGD, http://www.acronymgeek.com/SGD (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SGD, http://www.acronymgeek.com/SGD (optional description here) (as of Feb. 9, 2012, 21:06). |
| AMA | SGD. Acronym Geek. February 9, 2012, 21:06. Available at: http://www.acronymgeek.com/SGD. Accessed February 9, 2012, 21:06. |