| APA | OTD. (2012, February 13). In Acronym Geek. Retrieved 23:15, February 13, 2012, from http://www.acronymgeek.com/OTD |
| MLA | "OTD." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/OTD>. |
| MHRA | 'OTD', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/OTD> [accessed 13 February 2012] |
| Chicago | "OTD", http://www.acronymgeek.com/OTD (accessed February 13, 2012). |
| CBE/CSE | OTD [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/OTD. |
| Bluebook | OTD, http://www.acronymgeek.com/OTD (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTD, http://www.acronymgeek.com/OTD (optional description here) (as of Feb. 13, 2012, 23:15). |
| AMA | OTD. Acronym Geek. February 13, 2012, 23:15. Available at: http://www.acronymgeek.com/OTD. Accessed February 13, 2012, 23:15. |