| APA | PKB. (2012, February 14). In Acronym Geek. Retrieved 02:07, February 14, 2012, from http://www.acronymgeek.com/PKB |
| MLA | "PKB." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PKB>. |
| MHRA | 'PKB', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PKB> [accessed 14 February 2012] |
| Chicago | "PKB", http://www.acronymgeek.com/PKB (accessed February 14, 2012). |
| CBE/CSE | PKB [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PKB. |
| Bluebook | PKB, http://www.acronymgeek.com/PKB (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PKB, http://www.acronymgeek.com/PKB (optional description here) (as of Feb. 14, 2012, 02:07). |
| AMA | PKB. Acronym Geek. February 14, 2012, 02:07. Available at: http://www.acronymgeek.com/PKB. Accessed February 14, 2012, 02:07. |