| APA | PLSO. (2012, February 16). In Acronym Geek. Retrieved 20:20, February 16, 2012, from http://www.acronymgeek.com/PLSO |
| MLA | "PLSO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PLSO>. |
| MHRA | 'PLSO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PLSO> [accessed 16 February 2012] |
| Chicago | "PLSO", http://www.acronymgeek.com/PLSO (accessed February 16, 2012). |
| CBE/CSE | PLSO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PLSO. |
| Bluebook | PLSO, http://www.acronymgeek.com/PLSO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PLSO, http://www.acronymgeek.com/PLSO (optional description here) (as of Feb. 16, 2012, 20:20). |
| AMA | PLSO. Acronym Geek. February 16, 2012, 20:20. Available at: http://www.acronymgeek.com/PLSO. Accessed February 16, 2012, 20:20. |