| APA | PU. (2012, February 14). In Acronym Geek. Retrieved 06:50, February 14, 2012, from http://www.acronymgeek.com/PU |
| MLA | "PU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PU>. |
| MHRA | 'PU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PU> [accessed 14 February 2012] |
| Chicago | "PU", http://www.acronymgeek.com/PU (accessed February 14, 2012). |
| CBE/CSE | PU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PU. |
| Bluebook | PU, http://www.acronymgeek.com/PU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PU, http://www.acronymgeek.com/PU (optional description here) (as of Feb. 14, 2012, 06:50). |
| AMA | PU. Acronym Geek. February 14, 2012, 06:50. Available at: http://www.acronymgeek.com/PU. Accessed February 14, 2012, 06:50. |