| APA | HHHE. (2012, February 11). In Acronym Geek. Retrieved 23:37, February 11, 2012, from http://www.acronymgeek.com/HHHE |
| MLA | "HHHE." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/HHHE>. |
| MHRA | 'HHHE', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/HHHE> [accessed 11 February 2012] |
| Chicago | "HHHE", http://www.acronymgeek.com/HHHE (accessed February 11, 2012). |
| CBE/CSE | HHHE [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/HHHE. |
| Bluebook | HHHE, http://www.acronymgeek.com/HHHE (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHHE, http://www.acronymgeek.com/HHHE (optional description here) (as of Feb. 11, 2012, 23:37). |
| AMA | HHHE. Acronym Geek. February 11, 2012, 23:37. Available at: http://www.acronymgeek.com/HHHE. Accessed February 11, 2012, 23:37. |