| APA | OYPR. (2012, February 15). In Acronym Geek. Retrieved 23:53, February 15, 2012, from http://www.acronymgeek.com/OYPR |
| MLA | "OYPR." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OYPR>. |
| MHRA | 'OYPR', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OYPR> [accessed 15 February 2012] |
| Chicago | "OYPR", http://www.acronymgeek.com/OYPR (accessed February 15, 2012). |
| CBE/CSE | OYPR [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OYPR. |
| Bluebook | OYPR, http://www.acronymgeek.com/OYPR (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OYPR, http://www.acronymgeek.com/OYPR (optional description here) (as of Feb. 15, 2012, 23:53). |
| AMA | OYPR. Acronym Geek. February 15, 2012, 23:53. Available at: http://www.acronymgeek.com/OYPR. Accessed February 15, 2012, 23:53. |