| APA | OYPD. (2012, February 16). In Acronym Geek. Retrieved 18:36, February 16, 2012, from http://www.acronymgeek.com/OYPD |
| MLA | "OYPD." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OYPD>. |
| MHRA | 'OYPD', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OYPD> [accessed 16 February 2012] |
| Chicago | "OYPD", http://www.acronymgeek.com/OYPD (accessed February 16, 2012). |
| CBE/CSE | OYPD [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OYPD. |
| Bluebook | OYPD, http://www.acronymgeek.com/OYPD (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OYPD, http://www.acronymgeek.com/OYPD (optional description here) (as of Feb. 16, 2012, 18:36). |
| AMA | OYPD. Acronym Geek. February 16, 2012, 18:36. Available at: http://www.acronymgeek.com/OYPD. Accessed February 16, 2012, 18:36. |