| APA | PGBS. (2012, February 16). In Acronym Geek. Retrieved 05:35, February 16, 2012, from http://www.acronymgeek.com/PGBS |
| MLA | "PGBS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PGBS>. |
| MHRA | 'PGBS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PGBS> [accessed 16 February 2012] |
| Chicago | "PGBS", http://www.acronymgeek.com/PGBS (accessed February 16, 2012). |
| CBE/CSE | PGBS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PGBS. |
| Bluebook | PGBS, http://www.acronymgeek.com/PGBS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PGBS, http://www.acronymgeek.com/PGBS (optional description here) (as of Feb. 16, 2012, 05:35). |
| AMA | PGBS. Acronym Geek. February 16, 2012, 05:35. Available at: http://www.acronymgeek.com/PGBS. Accessed February 16, 2012, 05:35. |