| APA | HMH. (2012, February 14). In Acronym Geek. Retrieved 19:43, February 14, 2012, from http://www.acronymgeek.com/HMH |
| MLA | "HMH." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HMH>. |
| MHRA | 'HMH', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HMH> [accessed 14 February 2012] |
| Chicago | "HMH", http://www.acronymgeek.com/HMH (accessed February 14, 2012). |
| CBE/CSE | HMH [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HMH. |
| Bluebook | HMH, http://www.acronymgeek.com/HMH (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HMH, http://www.acronymgeek.com/HMH (optional description here) (as of Feb. 14, 2012, 19:43). |
| AMA | HMH. Acronym Geek. February 14, 2012, 19:43. Available at: http://www.acronymgeek.com/HMH. Accessed February 14, 2012, 19:43. |