| APA | PTBR. (2012, February 10). In Acronym Geek. Retrieved 07:07, February 10, 2012, from http://www.acronymgeek.com/PTBR |
| MLA | "PTBR." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/PTBR>. |
| MHRA | 'PTBR', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/PTBR> [accessed 10 February 2012] |
| Chicago | "PTBR", http://www.acronymgeek.com/PTBR (accessed February 10, 2012). |
| CBE/CSE | PTBR [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/PTBR. |
| Bluebook | PTBR, http://www.acronymgeek.com/PTBR (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTBR, http://www.acronymgeek.com/PTBR (optional description here) (as of Feb. 10, 2012, 07:07). |
| AMA | PTBR. Acronym Geek. February 10, 2012, 07:07. Available at: http://www.acronymgeek.com/PTBR. Accessed February 10, 2012, 07:07. |