| APA | PBLK. (2012, February 15). In Acronym Geek. Retrieved 07:13, February 15, 2012, from http://www.acronymgeek.com/PBLK |
| MLA | "PBLK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PBLK>. |
| MHRA | 'PBLK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PBLK> [accessed 15 February 2012] |
| Chicago | "PBLK", http://www.acronymgeek.com/PBLK (accessed February 15, 2012). |
| CBE/CSE | PBLK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PBLK. |
| Bluebook | PBLK, http://www.acronymgeek.com/PBLK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PBLK, http://www.acronymgeek.com/PBLK (optional description here) (as of Feb. 15, 2012, 07:13). |
| AMA | PBLK. Acronym Geek. February 15, 2012, 07:13. Available at: http://www.acronymgeek.com/PBLK. Accessed February 15, 2012, 07:13. |