| APA | PUI. (2012, February 13). In Acronym Geek. Retrieved 21:01, February 13, 2012, from http://www.acronymgeek.com/PUI |
| MLA | "PUI." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/PUI>. |
| MHRA | 'PUI', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/PUI> [accessed 13 February 2012] |
| Chicago | "PUI", http://www.acronymgeek.com/PUI (accessed February 13, 2012). |
| CBE/CSE | PUI [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/PUI. |
| Bluebook | PUI, http://www.acronymgeek.com/PUI (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PUI, http://www.acronymgeek.com/PUI (optional description here) (as of Feb. 13, 2012, 21:01). |
| AMA | PUI. Acronym Geek. February 13, 2012, 21:01. Available at: http://www.acronymgeek.com/PUI. Accessed February 13, 2012, 21:01. |