| APA | NPS. (2012, February 14). In Acronym Geek. Retrieved 07:39, February 14, 2012, from http://www.acronymgeek.com/NPS |
| MLA | "NPS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/NPS>. |
| MHRA | 'NPS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/NPS> [accessed 14 February 2012] |
| Chicago | "NPS", http://www.acronymgeek.com/NPS (accessed February 14, 2012). |
| CBE/CSE | NPS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/NPS. |
| Bluebook | NPS, http://www.acronymgeek.com/NPS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPS, http://www.acronymgeek.com/NPS (optional description here) (as of Feb. 14, 2012, 07:39). |
| AMA | NPS. Acronym Geek. February 14, 2012, 07:39. Available at: http://www.acronymgeek.com/NPS. Accessed February 14, 2012, 07:39. |