| APA | OCCN. (2012, February 17). In Acronym Geek. Retrieved 08:18, February 17, 2012, from http://www.acronymgeek.com/OCCN |
| MLA | "OCCN." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/OCCN>. |
| MHRA | 'OCCN', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/OCCN> [accessed 17 February 2012] |
| Chicago | "OCCN", http://www.acronymgeek.com/OCCN (accessed February 17, 2012). |
| CBE/CSE | OCCN [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/OCCN. |
| Bluebook | OCCN, http://www.acronymgeek.com/OCCN (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OCCN, http://www.acronymgeek.com/OCCN (optional description here) (as of Feb. 17, 2012, 08:18). |
| AMA | OCCN. Acronym Geek. February 17, 2012, 08:18. Available at: http://www.acronymgeek.com/OCCN. Accessed February 17, 2012, 08:18. |