| APA | REEN. (2012, February 15). In Acronym Geek. Retrieved 17:02, February 15, 2012, from http://www.acronymgeek.com/REEN |
| MLA | "REEN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/REEN>. |
| MHRA | 'REEN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/REEN> [accessed 15 February 2012] |
| Chicago | "REEN", http://www.acronymgeek.com/REEN (accessed February 15, 2012). |
| CBE/CSE | REEN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/REEN. |
| Bluebook | REEN, http://www.acronymgeek.com/REEN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, REEN, http://www.acronymgeek.com/REEN (optional description here) (as of Feb. 15, 2012, 17:02). |
| AMA | REEN. Acronym Geek. February 15, 2012, 17:02. Available at: http://www.acronymgeek.com/REEN. Accessed February 15, 2012, 17:02. |