| APA | ENP. (2012, February 9). In Acronym Geek. Retrieved 13:12, February 9, 2012, from http://www.acronymgeek.com/ENP |
| MLA | "ENP." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/ENP>. |
| MHRA | 'ENP', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/ENP> [accessed 9 February 2012] |
| Chicago | "ENP", http://www.acronymgeek.com/ENP (accessed February 9, 2012). |
| CBE/CSE | ENP [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/ENP. |
| Bluebook | ENP, http://www.acronymgeek.com/ENP (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ENP, http://www.acronymgeek.com/ENP (optional description here) (as of Feb. 9, 2012, 13:12). |
| AMA | ENP. Acronym Geek. February 9, 2012, 13:12. Available at: http://www.acronymgeek.com/ENP. Accessed February 9, 2012, 13:12. |