| APA | OPTW. (2012, February 16). In Acronym Geek. Retrieved 21:48, February 16, 2012, from http://www.acronymgeek.com/OPTW |
| MLA | "OPTW." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OPTW>. |
| MHRA | 'OPTW', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OPTW> [accessed 16 February 2012] |
| Chicago | "OPTW", http://www.acronymgeek.com/OPTW (accessed February 16, 2012). |
| CBE/CSE | OPTW [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OPTW. |
| Bluebook | OPTW, http://www.acronymgeek.com/OPTW (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPTW, http://www.acronymgeek.com/OPTW (optional description here) (as of Feb. 16, 2012, 21:48). |
| AMA | OPTW. Acronym Geek. February 16, 2012, 21:48. Available at: http://www.acronymgeek.com/OPTW. Accessed February 16, 2012, 21:48. |