| APA | HRTA. (2012, February 15). In Acronym Geek. Retrieved 05:06, February 15, 2012, from http://www.acronymgeek.com/HRTA |
| MLA | "HRTA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HRTA>. |
| MHRA | 'HRTA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HRTA> [accessed 15 February 2012] |
| Chicago | "HRTA", http://www.acronymgeek.com/HRTA (accessed February 15, 2012). |
| CBE/CSE | HRTA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HRTA. |
| Bluebook | HRTA, http://www.acronymgeek.com/HRTA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRTA, http://www.acronymgeek.com/HRTA (optional description here) (as of Feb. 15, 2012, 05:06). |
| AMA | HRTA. Acronym Geek. February 15, 2012, 05:06. Available at: http://www.acronymgeek.com/HRTA. Accessed February 15, 2012, 05:06. |