| APA | OOL. (2012, February 14). In Acronym Geek. Retrieved 09:53, February 14, 2012, from http://www.acronymgeek.com/OOL |
| MLA | "OOL." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OOL>. |
| MHRA | 'OOL', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OOL> [accessed 14 February 2012] |
| Chicago | "OOL", http://www.acronymgeek.com/OOL (accessed February 14, 2012). |
| CBE/CSE | OOL [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OOL. |
| Bluebook | OOL, http://www.acronymgeek.com/OOL (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OOL, http://www.acronymgeek.com/OOL (optional description here) (as of Feb. 14, 2012, 09:53). |
| AMA | OOL. Acronym Geek. February 14, 2012, 09:53. Available at: http://www.acronymgeek.com/OOL. Accessed February 14, 2012, 09:53. |