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