| APA | PTBG. (2012, February 15). In Acronym Geek. Retrieved 07:24, February 15, 2012, from http://www.acronymgeek.com/PTBG |
| MLA | "PTBG." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PTBG>. |
| MHRA | 'PTBG', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PTBG> [accessed 15 February 2012] |
| Chicago | "PTBG", http://www.acronymgeek.com/PTBG (accessed February 15, 2012). |
| CBE/CSE | PTBG [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PTBG. |
| Bluebook | PTBG, http://www.acronymgeek.com/PTBG (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTBG, http://www.acronymgeek.com/PTBG (optional description here) (as of Feb. 15, 2012, 07:24). |
| AMA | PTBG. Acronym Geek. February 15, 2012, 07:24. Available at: http://www.acronymgeek.com/PTBG. Accessed February 15, 2012, 07:24. |