| APA | PBI. (2012, February 13). In Acronym Geek. Retrieved 21:10, February 13, 2012, from http://www.acronymgeek.com/PBI |
| MLA | "PBI." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/PBI>. |
| MHRA | 'PBI', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/PBI> [accessed 13 February 2012] |
| Chicago | "PBI", http://www.acronymgeek.com/PBI (accessed February 13, 2012). |
| CBE/CSE | PBI [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/PBI. |
| Bluebook | PBI, http://www.acronymgeek.com/PBI (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PBI, http://www.acronymgeek.com/PBI (optional description here) (as of Feb. 13, 2012, 21:10). |
| AMA | PBI. Acronym Geek. February 13, 2012, 21:10. Available at: http://www.acronymgeek.com/PBI. Accessed February 13, 2012, 21:10. |