| APA | PBAK. (2012, February 17). In Acronym Geek. Retrieved 02:21, February 17, 2012, from http://www.acronymgeek.com/PBAK |
| MLA | "PBAK." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/PBAK>. |
| MHRA | 'PBAK', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/PBAK> [accessed 17 February 2012] |
| Chicago | "PBAK", http://www.acronymgeek.com/PBAK (accessed February 17, 2012). |
| CBE/CSE | PBAK [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/PBAK. |
| Bluebook | PBAK, http://www.acronymgeek.com/PBAK (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PBAK, http://www.acronymgeek.com/PBAK (optional description here) (as of Feb. 17, 2012, 02:21). |
| AMA | PBAK. Acronym Geek. February 17, 2012, 02:21. Available at: http://www.acronymgeek.com/PBAK. Accessed February 17, 2012, 02:21. |