| APA | PRN. (2012, February 9). In Acronym Geek. Retrieved 08:36, February 9, 2012, from http://www.acronymgeek.com/PRN |
| MLA | "PRN." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/PRN>. |
| MHRA | 'PRN', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/PRN> [accessed 9 February 2012] |
| Chicago | "PRN", http://www.acronymgeek.com/PRN (accessed February 9, 2012). |
| CBE/CSE | PRN [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/PRN. |
| Bluebook | PRN, http://www.acronymgeek.com/PRN (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PRN, http://www.acronymgeek.com/PRN (optional description here) (as of Feb. 9, 2012, 08:36). |
| AMA | PRN. Acronym Geek. February 9, 2012, 08:36. Available at: http://www.acronymgeek.com/PRN. Accessed February 9, 2012, 08:36. |