| APA | ORN. (2012, February 14). In Acronym Geek. Retrieved 19:27, February 14, 2012, from http://www.acronymgeek.com/ORN |
| MLA | "ORN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ORN>. |
| MHRA | 'ORN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ORN> [accessed 14 February 2012] |
| Chicago | "ORN", http://www.acronymgeek.com/ORN (accessed February 14, 2012). |
| CBE/CSE | ORN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ORN. |
| Bluebook | ORN, http://www.acronymgeek.com/ORN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ORN, http://www.acronymgeek.com/ORN (optional description here) (as of Feb. 14, 2012, 19:27). |
| AMA | ORN. Acronym Geek. February 14, 2012, 19:27. Available at: http://www.acronymgeek.com/ORN. Accessed February 14, 2012, 19:27. |