| APA | VTL. (2012, February 15). In Acronym Geek. Retrieved 03:16, February 15, 2012, from http://www.acronymgeek.com/VTL |
| MLA | "VTL." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/VTL>. |
| MHRA | 'VTL', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/VTL> [accessed 15 February 2012] |
| Chicago | "VTL", http://www.acronymgeek.com/VTL (accessed February 15, 2012). |
| CBE/CSE | VTL [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/VTL. |
| Bluebook | VTL, http://www.acronymgeek.com/VTL (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, VTL, http://www.acronymgeek.com/VTL (optional description here) (as of Feb. 15, 2012, 03:16). |
| AMA | VTL. Acronym Geek. February 15, 2012, 03:16. Available at: http://www.acronymgeek.com/VTL. Accessed February 15, 2012, 03:16. |