| APA | RFEN. (2012, February 15). In Acronym Geek. Retrieved 06:55, February 15, 2012, from http://www.acronymgeek.com/RFEN |
| MLA | "RFEN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/RFEN>. |
| MHRA | 'RFEN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/RFEN> [accessed 15 February 2012] |
| Chicago | "RFEN", http://www.acronymgeek.com/RFEN (accessed February 15, 2012). |
| CBE/CSE | RFEN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/RFEN. |
| Bluebook | RFEN, http://www.acronymgeek.com/RFEN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, RFEN, http://www.acronymgeek.com/RFEN (optional description here) (as of Feb. 15, 2012, 06:55). |
| AMA | RFEN. Acronym Geek. February 15, 2012, 06:55. Available at: http://www.acronymgeek.com/RFEN. Accessed February 15, 2012, 06:55. |