| APA | PHG. (2012, February 14). In Acronym Geek. Retrieved 12:05, February 14, 2012, from http://www.acronymgeek.com/PHG |
| MLA | "PHG." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PHG>. |
| MHRA | 'PHG', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PHG> [accessed 14 February 2012] |
| Chicago | "PHG", http://www.acronymgeek.com/PHG (accessed February 14, 2012). |
| CBE/CSE | PHG [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PHG. |
| Bluebook | PHG, http://www.acronymgeek.com/PHG (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PHG, http://www.acronymgeek.com/PHG (optional description here) (as of Feb. 14, 2012, 12:05). |
| AMA | PHG. Acronym Geek. February 14, 2012, 12:05. Available at: http://www.acronymgeek.com/PHG. Accessed February 14, 2012, 12:05. |