| APA | PHKU. (2012, February 15). In Acronym Geek. Retrieved 18:23, February 15, 2012, from http://www.acronymgeek.com/PHKU |
| MLA | "PHKU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PHKU>. |
| MHRA | 'PHKU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PHKU> [accessed 15 February 2012] |
| Chicago | "PHKU", http://www.acronymgeek.com/PHKU (accessed February 15, 2012). |
| CBE/CSE | PHKU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PHKU. |
| Bluebook | PHKU, http://www.acronymgeek.com/PHKU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PHKU, http://www.acronymgeek.com/PHKU (optional description here) (as of Feb. 15, 2012, 18:23). |
| AMA | PHKU. Acronym Geek. February 15, 2012, 18:23. Available at: http://www.acronymgeek.com/PHKU. Accessed February 15, 2012, 18:23. |