| APA | PUR. (2012, February 15). In Acronym Geek. Retrieved 03:30, February 15, 2012, from http://www.acronymgeek.com/PUR |
| MLA | "PUR." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PUR>. |
| MHRA | 'PUR', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PUR> [accessed 15 February 2012] |
| Chicago | "PUR", http://www.acronymgeek.com/PUR (accessed February 15, 2012). |
| CBE/CSE | PUR [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PUR. |
| Bluebook | PUR, http://www.acronymgeek.com/PUR (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PUR, http://www.acronymgeek.com/PUR (optional description here) (as of Feb. 15, 2012, 03:30). |
| AMA | PUR. Acronym Geek. February 15, 2012, 03:30. Available at: http://www.acronymgeek.com/PUR. Accessed February 15, 2012, 03:30. |