| APA | PHW. (2012, February 13). In Acronym Geek. Retrieved 22:46, February 13, 2012, from http://www.acronymgeek.com/PHW |
| MLA | "PHW." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/PHW>. |
| MHRA | 'PHW', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/PHW> [accessed 13 February 2012] |
| Chicago | "PHW", http://www.acronymgeek.com/PHW (accessed February 13, 2012). |
| CBE/CSE | PHW [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/PHW. |
| Bluebook | PHW, http://www.acronymgeek.com/PHW (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PHW, http://www.acronymgeek.com/PHW (optional description here) (as of Feb. 13, 2012, 22:46). |
| AMA | PHW. Acronym Geek. February 13, 2012, 22:46. Available at: http://www.acronymgeek.com/PHW. Accessed February 13, 2012, 22:46. |