| APA | ROPO. (2012, February 15). In Acronym Geek. Retrieved 14:39, February 15, 2012, from http://www.acronymgeek.com/ROPO |
| MLA | "ROPO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ROPO>. |
| MHRA | 'ROPO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ROPO> [accessed 15 February 2012] |
| Chicago | "ROPO", http://www.acronymgeek.com/ROPO (accessed February 15, 2012). |
| CBE/CSE | ROPO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ROPO. |
| Bluebook | ROPO, http://www.acronymgeek.com/ROPO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ROPO, http://www.acronymgeek.com/ROPO (optional description here) (as of Feb. 15, 2012, 14:39). |
| AMA | ROPO. Acronym Geek. February 15, 2012, 14:39. Available at: http://www.acronymgeek.com/ROPO. Accessed February 15, 2012, 14:39. |