| APA | PTBN. (2012, February 15). In Acronym Geek. Retrieved 00:45, February 15, 2012, from http://www.acronymgeek.com/PTBN |
| MLA | "PTBN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PTBN>. |
| MHRA | 'PTBN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PTBN> [accessed 15 February 2012] |
| Chicago | "PTBN", http://www.acronymgeek.com/PTBN (accessed February 15, 2012). |
| CBE/CSE | PTBN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PTBN. |
| Bluebook | PTBN, http://www.acronymgeek.com/PTBN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTBN, http://www.acronymgeek.com/PTBN (optional description here) (as of Feb. 15, 2012, 00:45). |
| AMA | PTBN. Acronym Geek. February 15, 2012, 00:45. Available at: http://www.acronymgeek.com/PTBN. Accessed February 15, 2012, 00:45. |