| APA | VFO. (2012, February 9). In Acronym Geek. Retrieved 09:29, February 9, 2012, from http://www.acronymgeek.com/VFO |
| MLA | "VFO." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/VFO>. |
| MHRA | 'VFO', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/VFO> [accessed 9 February 2012] |
| Chicago | "VFO", http://www.acronymgeek.com/VFO (accessed February 9, 2012). |
| CBE/CSE | VFO [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/VFO. |
| Bluebook | VFO, http://www.acronymgeek.com/VFO (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, VFO, http://www.acronymgeek.com/VFO (optional description here) (as of Feb. 9, 2012, 09:29). |
| AMA | VFO. Acronym Geek. February 9, 2012, 09:29. Available at: http://www.acronymgeek.com/VFO. Accessed February 9, 2012, 09:29. |