| APA | PBLS. (2012, February 16). In Acronym Geek. Retrieved 07:39, February 16, 2012, from http://www.acronymgeek.com/PBLS |
| MLA | "PBLS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PBLS>. |
| MHRA | 'PBLS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PBLS> [accessed 16 February 2012] |
| Chicago | "PBLS", http://www.acronymgeek.com/PBLS (accessed February 16, 2012). |
| CBE/CSE | PBLS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PBLS. |
| Bluebook | PBLS, http://www.acronymgeek.com/PBLS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PBLS, http://www.acronymgeek.com/PBLS (optional description here) (as of Feb. 16, 2012, 07:39). |
| AMA | PBLS. Acronym Geek. February 16, 2012, 07:39. Available at: http://www.acronymgeek.com/PBLS. Accessed February 16, 2012, 07:39. |