| APA | HMO. (2012, February 10). In Acronym Geek. Retrieved 07:26, February 10, 2012, from http://www.acronymgeek.com/HMO |
| MLA | "HMO." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HMO>. |
| MHRA | 'HMO', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HMO> [accessed 10 February 2012] |
| Chicago | "HMO", http://www.acronymgeek.com/HMO (accessed February 10, 2012). |
| CBE/CSE | HMO [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HMO. |
| Bluebook | HMO, http://www.acronymgeek.com/HMO (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HMO, http://www.acronymgeek.com/HMO (optional description here) (as of Feb. 10, 2012, 07:26). |
| AMA | HMO. Acronym Geek. February 10, 2012, 07:26. Available at: http://www.acronymgeek.com/HMO. Accessed February 10, 2012, 07:26. |