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