| APA | HEL. (2012, February 9). In Acronym Geek. Retrieved 02:33, February 9, 2012, from http://www.acronymgeek.com/HEL |
| MLA | "HEL." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/HEL>. |
| MHRA | 'HEL', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/HEL> [accessed 9 February 2012] |
| Chicago | "HEL", http://www.acronymgeek.com/HEL (accessed February 9, 2012). |
| CBE/CSE | HEL [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/HEL. |
| Bluebook | HEL, http://www.acronymgeek.com/HEL (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HEL, http://www.acronymgeek.com/HEL (optional description here) (as of Feb. 9, 2012, 02:33). |
| AMA | HEL. Acronym Geek. February 9, 2012, 02:33. Available at: http://www.acronymgeek.com/HEL. Accessed February 9, 2012, 02:33. |