| APA | OTN. (2012, February 14). In Acronym Geek. Retrieved 08:04, February 14, 2012, from http://www.acronymgeek.com/OTN |
| MLA | "OTN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OTN>. |
| MHRA | 'OTN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OTN> [accessed 14 February 2012] |
| Chicago | "OTN", http://www.acronymgeek.com/OTN (accessed February 14, 2012). |
| CBE/CSE | OTN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OTN. |
| Bluebook | OTN, http://www.acronymgeek.com/OTN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTN, http://www.acronymgeek.com/OTN (optional description here) (as of Feb. 14, 2012, 08:04). |
| AMA | OTN. Acronym Geek. February 14, 2012, 08:04. Available at: http://www.acronymgeek.com/OTN. Accessed February 14, 2012, 08:04. |