| APA | OLD. (2012, February 13). In Acronym Geek. Retrieved 21:45, February 13, 2012, from http://www.acronymgeek.com/OLD |
| MLA | "OLD." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/OLD>. |
| MHRA | 'OLD', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/OLD> [accessed 13 February 2012] |
| Chicago | "OLD", http://www.acronymgeek.com/OLD (accessed February 13, 2012). |
| CBE/CSE | OLD [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/OLD. |
| Bluebook | OLD, http://www.acronymgeek.com/OLD (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OLD, http://www.acronymgeek.com/OLD (optional description here) (as of Feb. 13, 2012, 21:45). |
| AMA | OLD. Acronym Geek. February 13, 2012, 21:45. Available at: http://www.acronymgeek.com/OLD. Accessed February 13, 2012, 21:45. |