| APA | PPB. (2012, February 9). In Acronym Geek. Retrieved 20:36, February 9, 2012, from http://www.acronymgeek.com/PPB |
| MLA | "PPB." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/PPB>. |
| MHRA | 'PPB', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/PPB> [accessed 9 February 2012] |
| Chicago | "PPB", http://www.acronymgeek.com/PPB (accessed February 9, 2012). |
| CBE/CSE | PPB [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/PPB. |
| Bluebook | PPB, http://www.acronymgeek.com/PPB (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PPB, http://www.acronymgeek.com/PPB (optional description here) (as of Feb. 9, 2012, 20:36). |
| AMA | PPB. Acronym Geek. February 9, 2012, 20:36. Available at: http://www.acronymgeek.com/PPB. Accessed February 9, 2012, 20:36. |