| APA | CPNO. (2012, February 12). In Acronym Geek. Retrieved 05:04, February 12, 2012, from http://www.acronymgeek.com/CPNO |
| MLA | "CPNO." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/CPNO>. |
| MHRA | 'CPNO', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/CPNO> [accessed 12 February 2012] |
| Chicago | "CPNO", http://www.acronymgeek.com/CPNO (accessed February 12, 2012). |
| CBE/CSE | CPNO [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/CPNO. |
| Bluebook | CPNO, http://www.acronymgeek.com/CPNO (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CPNO, http://www.acronymgeek.com/CPNO (optional description here) (as of Feb. 12, 2012, 05:04). |
| AMA | CPNO. Acronym Geek. February 12, 2012, 05:04. Available at: http://www.acronymgeek.com/CPNO. Accessed February 12, 2012, 05:04. |