| APA | PNFL. (2012, February 17). In Acronym Geek. Retrieved 05:36, February 17, 2012, from http://www.acronymgeek.com/PNFL |
| MLA | "PNFL." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/PNFL>. |
| MHRA | 'PNFL', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/PNFL> [accessed 17 February 2012] |
| Chicago | "PNFL", http://www.acronymgeek.com/PNFL (accessed February 17, 2012). |
| CBE/CSE | PNFL [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/PNFL. |
| Bluebook | PNFL, http://www.acronymgeek.com/PNFL (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PNFL, http://www.acronymgeek.com/PNFL (optional description here) (as of Feb. 17, 2012, 05:36). |
| AMA | PNFL. Acronym Geek. February 17, 2012, 05:36. Available at: http://www.acronymgeek.com/PNFL. Accessed February 17, 2012, 05:36. |