| APA | ORVN. (2012, February 16). In Acronym Geek. Retrieved 06:52, February 16, 2012, from http://www.acronymgeek.com/ORVN |
| MLA | "ORVN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ORVN>. |
| MHRA | 'ORVN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ORVN> [accessed 16 February 2012] |
| Chicago | "ORVN", http://www.acronymgeek.com/ORVN (accessed February 16, 2012). |
| CBE/CSE | ORVN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ORVN. |
| Bluebook | ORVN, http://www.acronymgeek.com/ORVN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ORVN, http://www.acronymgeek.com/ORVN (optional description here) (as of Feb. 16, 2012, 06:52). |
| AMA | ORVN. Acronym Geek. February 16, 2012, 06:52. Available at: http://www.acronymgeek.com/ORVN. Accessed February 16, 2012, 06:52. |