| APA | USPI. (2012, February 16). In Acronym Geek. Retrieved 08:28, February 16, 2012, from http://www.acronymgeek.com/USPI |
| MLA | "USPI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/USPI>. |
| MHRA | 'USPI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/USPI> [accessed 16 February 2012] |
| Chicago | "USPI", http://www.acronymgeek.com/USPI (accessed February 16, 2012). |
| CBE/CSE | USPI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/USPI. |
| Bluebook | USPI, http://www.acronymgeek.com/USPI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, USPI, http://www.acronymgeek.com/USPI (optional description here) (as of Feb. 16, 2012, 08:28). |
| AMA | USPI. Acronym Geek. February 16, 2012, 08:28. Available at: http://www.acronymgeek.com/USPI. Accessed February 16, 2012, 08:28. |