| APA | PTBW. (2012, February 16). In Acronym Geek. Retrieved 05:52, February 16, 2012, from http://www.acronymgeek.com/PTBW |
| MLA | "PTBW." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PTBW>. |
| MHRA | 'PTBW', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PTBW> [accessed 16 February 2012] |
| Chicago | "PTBW", http://www.acronymgeek.com/PTBW (accessed February 16, 2012). |
| CBE/CSE | PTBW [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PTBW. |
| Bluebook | PTBW, http://www.acronymgeek.com/PTBW (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTBW, http://www.acronymgeek.com/PTBW (optional description here) (as of Feb. 16, 2012, 05:52). |
| AMA | PTBW. Acronym Geek. February 16, 2012, 05:52. Available at: http://www.acronymgeek.com/PTBW. Accessed February 16, 2012, 05:52. |