| APA | ATU. (2012, February 14). In Acronym Geek. Retrieved 11:21, February 14, 2012, from http://www.acronymgeek.com/ATU |
| MLA | "ATU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ATU>. |
| MHRA | 'ATU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ATU> [accessed 14 February 2012] |
| Chicago | "ATU", http://www.acronymgeek.com/ATU (accessed February 14, 2012). |
| CBE/CSE | ATU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ATU. |
| Bluebook | ATU, http://www.acronymgeek.com/ATU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ATU, http://www.acronymgeek.com/ATU (optional description here) (as of Feb. 14, 2012, 11:21). |
| AMA | ATU. Acronym Geek. February 14, 2012, 11:21. Available at: http://www.acronymgeek.com/ATU. Accessed February 14, 2012, 11:21. |