| APA | 4NR. (2012, February 10). In Acronym Geek. Retrieved 08:25, February 10, 2012, from http://www.acronymgeek.com/4NR |
| MLA | "4NR." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/4NR>. |
| MHRA | '4NR', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/4NR> [accessed 10 February 2012] |
| Chicago | "4NR", http://www.acronymgeek.com/4NR (accessed February 10, 2012). |
| CBE/CSE | 4NR [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/4NR. |
| Bluebook | 4NR, http://www.acronymgeek.com/4NR (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 4NR, http://www.acronymgeek.com/4NR (optional description here) (as of Feb. 10, 2012, 08:25). |
| AMA | 4NR. Acronym Geek. February 10, 2012, 08:25. Available at: http://www.acronymgeek.com/4NR. Accessed February 10, 2012, 08:25. |