| APA | PKS. (2012, February 14). In Acronym Geek. Retrieved 11:35, February 14, 2012, from http://www.acronymgeek.com/PKS |
| MLA | "PKS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PKS>. |
| MHRA | 'PKS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PKS> [accessed 14 February 2012] |
| Chicago | "PKS", http://www.acronymgeek.com/PKS (accessed February 14, 2012). |
| CBE/CSE | PKS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PKS. |
| Bluebook | PKS, http://www.acronymgeek.com/PKS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PKS, http://www.acronymgeek.com/PKS (optional description here) (as of Feb. 14, 2012, 11:35). |
| AMA | PKS. Acronym Geek. February 14, 2012, 11:35. Available at: http://www.acronymgeek.com/PKS. Accessed February 14, 2012, 11:35. |