| APA | PTHB. (2012, February 15). In Acronym Geek. Retrieved 20:19, February 15, 2012, from http://www.acronymgeek.com/PTHB |
| MLA | "PTHB." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PTHB>. |
| MHRA | 'PTHB', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PTHB> [accessed 15 February 2012] |
| Chicago | "PTHB", http://www.acronymgeek.com/PTHB (accessed February 15, 2012). |
| CBE/CSE | PTHB [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PTHB. |
| Bluebook | PTHB, http://www.acronymgeek.com/PTHB (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTHB, http://www.acronymgeek.com/PTHB (optional description here) (as of Feb. 15, 2012, 20:19). |
| AMA | PTHB. Acronym Geek. February 15, 2012, 20:19. Available at: http://www.acronymgeek.com/PTHB. Accessed February 15, 2012, 20:19. |