| APA | HDYC. (2012, February 17). In Acronym Geek. Retrieved 00:30, February 17, 2012, from http://www.acronymgeek.com/HDYC |
| MLA | "HDYC." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HDYC>. |
| MHRA | 'HDYC', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HDYC> [accessed 17 February 2012] |
| Chicago | "HDYC", http://www.acronymgeek.com/HDYC (accessed February 17, 2012). |
| CBE/CSE | HDYC [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HDYC. |
| Bluebook | HDYC, http://www.acronymgeek.com/HDYC (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDYC, http://www.acronymgeek.com/HDYC (optional description here) (as of Feb. 17, 2012, 00:30). |
| AMA | HDYC. Acronym Geek. February 17, 2012, 00:30. Available at: http://www.acronymgeek.com/HDYC. Accessed February 17, 2012, 00:30. |