| APA | PTBA. (2012, February 15). In Acronym Geek. Retrieved 12:25, February 15, 2012, from http://www.acronymgeek.com/PTBA |
| MLA | "PTBA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PTBA>. |
| MHRA | 'PTBA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PTBA> [accessed 15 February 2012] |
| Chicago | "PTBA", http://www.acronymgeek.com/PTBA (accessed February 15, 2012). |
| CBE/CSE | PTBA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PTBA. |
| Bluebook | PTBA, http://www.acronymgeek.com/PTBA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTBA, http://www.acronymgeek.com/PTBA (optional description here) (as of Feb. 15, 2012, 12:25). |
| AMA | PTBA. Acronym Geek. February 15, 2012, 12:25. Available at: http://www.acronymgeek.com/PTBA. Accessed February 15, 2012, 12:25. |