| APA | ONCA. (2012, February 15). In Acronym Geek. Retrieved 10:24, February 15, 2012, from http://www.acronymgeek.com/ONCA |
| MLA | "ONCA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ONCA>. |
| MHRA | 'ONCA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ONCA> [accessed 15 February 2012] |
| Chicago | "ONCA", http://www.acronymgeek.com/ONCA (accessed February 15, 2012). |
| CBE/CSE | ONCA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ONCA. |
| Bluebook | ONCA, http://www.acronymgeek.com/ONCA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ONCA, http://www.acronymgeek.com/ONCA (optional description here) (as of Feb. 15, 2012, 10:24). |
| AMA | ONCA. Acronym Geek. February 15, 2012, 10:24. Available at: http://www.acronymgeek.com/ONCA. Accessed February 15, 2012, 10:24. |