| APA | RETN. (2012, February 16). In Acronym Geek. Retrieved 21:18, February 16, 2012, from http://www.acronymgeek.com/RETN |
| MLA | "RETN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/RETN>. |
| MHRA | 'RETN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/RETN> [accessed 16 February 2012] |
| Chicago | "RETN", http://www.acronymgeek.com/RETN (accessed February 16, 2012). |
| CBE/CSE | RETN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/RETN. |
| Bluebook | RETN, http://www.acronymgeek.com/RETN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, RETN, http://www.acronymgeek.com/RETN (optional description here) (as of Feb. 16, 2012, 21:18). |
| AMA | RETN. Acronym Geek. February 16, 2012, 21:18. Available at: http://www.acronymgeek.com/RETN. Accessed February 16, 2012, 21:18. |