| APA | HSYM. (2012, February 16). In Acronym Geek. Retrieved 17:36, February 16, 2012, from http://www.acronymgeek.com/HSYM |
| MLA | "HSYM." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HSYM>. |
| MHRA | 'HSYM', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HSYM> [accessed 16 February 2012] |
| Chicago | "HSYM", http://www.acronymgeek.com/HSYM (accessed February 16, 2012). |
| CBE/CSE | HSYM [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HSYM. |
| Bluebook | HSYM, http://www.acronymgeek.com/HSYM (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HSYM, http://www.acronymgeek.com/HSYM (optional description here) (as of Feb. 16, 2012, 17:36). |
| AMA | HSYM. Acronym Geek. February 16, 2012, 17:36. Available at: http://www.acronymgeek.com/HSYM. Accessed February 16, 2012, 17:36. |