| APA | USPK. (2012, February 15). In Acronym Geek. Retrieved 18:23, February 15, 2012, from http://www.acronymgeek.com/USPK |
| MLA | "USPK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/USPK>. |
| MHRA | 'USPK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/USPK> [accessed 15 February 2012] |
| Chicago | "USPK", http://www.acronymgeek.com/USPK (accessed February 15, 2012). |
| CBE/CSE | USPK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/USPK. |
| Bluebook | USPK, http://www.acronymgeek.com/USPK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, USPK, http://www.acronymgeek.com/USPK (optional description here) (as of Feb. 15, 2012, 18:23). |
| AMA | USPK. Acronym Geek. February 15, 2012, 18:23. Available at: http://www.acronymgeek.com/USPK. Accessed February 15, 2012, 18:23. |