| APA | HEED. (2012, February 15). In Acronym Geek. Retrieved 01:14, February 15, 2012, from http://www.acronymgeek.com/HEED |
| MLA | "HEED." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HEED>. |
| MHRA | 'HEED', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HEED> [accessed 15 February 2012] |
| Chicago | "HEED", http://www.acronymgeek.com/HEED (accessed February 15, 2012). |
| CBE/CSE | HEED [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HEED. |
| Bluebook | HEED, http://www.acronymgeek.com/HEED (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HEED, http://www.acronymgeek.com/HEED (optional description here) (as of Feb. 15, 2012, 01:14). |
| AMA | HEED. Acronym Geek. February 15, 2012, 01:14. Available at: http://www.acronymgeek.com/HEED. Accessed February 15, 2012, 01:14. |