| APA | PENH. (2012, February 16). In Acronym Geek. Retrieved 01:44, February 16, 2012, from http://www.acronymgeek.com/PENH |
| MLA | "PENH." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PENH>. |
| MHRA | 'PENH', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PENH> [accessed 16 February 2012] |
| Chicago | "PENH", http://www.acronymgeek.com/PENH (accessed February 16, 2012). |
| CBE/CSE | PENH [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PENH. |
| Bluebook | PENH, http://www.acronymgeek.com/PENH (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PENH, http://www.acronymgeek.com/PENH (optional description here) (as of Feb. 16, 2012, 01:44). |
| AMA | PENH. Acronym Geek. February 16, 2012, 01:44. Available at: http://www.acronymgeek.com/PENH. Accessed February 16, 2012, 01:44. |