| APA | DNOP. (2012, February 17). In Acronym Geek. Retrieved 08:12, February 17, 2012, from http://www.acronymgeek.com/DNOP |
| MLA | "DNOP." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/DNOP>. |
| MHRA | 'DNOP', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/DNOP> [accessed 17 February 2012] |
| Chicago | "DNOP", http://www.acronymgeek.com/DNOP (accessed February 17, 2012). |
| CBE/CSE | DNOP [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/DNOP. |
| Bluebook | DNOP, http://www.acronymgeek.com/DNOP (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DNOP, http://www.acronymgeek.com/DNOP (optional description here) (as of Feb. 17, 2012, 08:12). |
| AMA | DNOP. Acronym Geek. February 17, 2012, 08:12. Available at: http://www.acronymgeek.com/DNOP. Accessed February 17, 2012, 08:12. |