| APA | UNEP. (2012, February 10). In Acronym Geek. Retrieved 11:57, February 10, 2012, from http://www.acronymgeek.com/UNEP |
| MLA | "UNEP." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/UNEP>. |
| MHRA | 'UNEP', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/UNEP> [accessed 10 February 2012] |
| Chicago | "UNEP", http://www.acronymgeek.com/UNEP (accessed February 10, 2012). |
| CBE/CSE | UNEP [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/UNEP. |
| Bluebook | UNEP, http://www.acronymgeek.com/UNEP (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UNEP, http://www.acronymgeek.com/UNEP (optional description here) (as of Feb. 10, 2012, 11:57). |
| AMA | UNEP. Acronym Geek. February 10, 2012, 11:57. Available at: http://www.acronymgeek.com/UNEP. Accessed February 10, 2012, 11:57. |