| APA | PKIS. (2012, February 14). In Acronym Geek. Retrieved 00:04, February 14, 2012, from http://www.acronymgeek.com/PKIS |
| MLA | "PKIS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PKIS>. |
| MHRA | 'PKIS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PKIS> [accessed 14 February 2012] |
| Chicago | "PKIS", http://www.acronymgeek.com/PKIS (accessed February 14, 2012). |
| CBE/CSE | PKIS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PKIS. |
| Bluebook | PKIS, http://www.acronymgeek.com/PKIS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PKIS, http://www.acronymgeek.com/PKIS (optional description here) (as of Feb. 14, 2012, 00:04). |
| AMA | PKIS. Acronym Geek. February 14, 2012, 00:04. Available at: http://www.acronymgeek.com/PKIS. Accessed February 14, 2012, 00:04. |