| APA | DNPO. (2012, February 14). In Acronym Geek. Retrieved 18:48, February 14, 2012, from http://www.acronymgeek.com/DNPO |
| MLA | "DNPO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DNPO>. |
| MHRA | 'DNPO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DNPO> [accessed 14 February 2012] |
| Chicago | "DNPO", http://www.acronymgeek.com/DNPO (accessed February 14, 2012). |
| CBE/CSE | DNPO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DNPO. |
| Bluebook | DNPO, http://www.acronymgeek.com/DNPO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DNPO, http://www.acronymgeek.com/DNPO (optional description here) (as of Feb. 14, 2012, 18:48). |
| AMA | DNPO. Acronym Geek. February 14, 2012, 18:48. Available at: http://www.acronymgeek.com/DNPO. Accessed February 14, 2012, 18:48. |