| APA | HCA. (2012, February 14). In Acronym Geek. Retrieved 19:21, February 14, 2012, from http://www.acronymgeek.com/HCA |
| MLA | "HCA." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HCA>. |
| MHRA | 'HCA', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HCA> [accessed 14 February 2012] |
| Chicago | "HCA", http://www.acronymgeek.com/HCA (accessed February 14, 2012). |
| CBE/CSE | HCA [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HCA. |
| Bluebook | HCA, http://www.acronymgeek.com/HCA (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HCA, http://www.acronymgeek.com/HCA (optional description here) (as of Feb. 14, 2012, 19:21). |
| AMA | HCA. Acronym Geek. February 14, 2012, 19:21. Available at: http://www.acronymgeek.com/HCA. Accessed February 14, 2012, 19:21. |