| APA | HA-API. (2012, February 12). In Acronym Geek. Retrieved 08:40, February 12, 2012, from http://www.acronymgeek.com/HA-API |
| MLA | "HA-API." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/HA-API>. |
| MHRA | 'HA-API', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/HA-API> [accessed 12 February 2012] |
| Chicago | "HA-API", http://www.acronymgeek.com/HA-API (accessed February 12, 2012). |
| CBE/CSE | HA-API [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/HA-API. |
| Bluebook | HA-API, http://www.acronymgeek.com/HA-API (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HA-API, http://www.acronymgeek.com/HA-API (optional description here) (as of Feb. 12, 2012, 08:40). |
| AMA | HA-API. Acronym Geek. February 12, 2012, 08:40. Available at: http://www.acronymgeek.com/HA-API. Accessed February 12, 2012, 08:40. |