| APA | HSDO. (2012, February 16). In Acronym Geek. Retrieved 06:43, February 16, 2012, from http://www.acronymgeek.com/HSDO |
| MLA | "HSDO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HSDO>. |
| MHRA | 'HSDO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HSDO> [accessed 16 February 2012] |
| Chicago | "HSDO", http://www.acronymgeek.com/HSDO (accessed February 16, 2012). |
| CBE/CSE | HSDO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HSDO. |
| Bluebook | HSDO, http://www.acronymgeek.com/HSDO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HSDO, http://www.acronymgeek.com/HSDO (optional description here) (as of Feb. 16, 2012, 06:43). |
| AMA | HSDO. Acronym Geek. February 16, 2012, 06:43. Available at: http://www.acronymgeek.com/HSDO. Accessed February 16, 2012, 06:43. |