| APA | FENO. (2012, February 15). In Acronym Geek. Retrieved 19:23, February 15, 2012, from http://www.acronymgeek.com/FENO |
| MLA | "FENO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/FENO>. |
| MHRA | 'FENO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/FENO> [accessed 15 February 2012] |
| Chicago | "FENO", http://www.acronymgeek.com/FENO (accessed February 15, 2012). |
| CBE/CSE | FENO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/FENO. |
| Bluebook | FENO, http://www.acronymgeek.com/FENO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FENO, http://www.acronymgeek.com/FENO (optional description here) (as of Feb. 15, 2012, 19:23). |
| AMA | FENO. Acronym Geek. February 15, 2012, 19:23. Available at: http://www.acronymgeek.com/FENO. Accessed February 15, 2012, 19:23. |