| APA | NBO. (2012, February 14). In Acronym Geek. Retrieved 04:24, February 14, 2012, from http://www.acronymgeek.com/NBO |
| MLA | "NBO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/NBO>. |
| MHRA | 'NBO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/NBO> [accessed 14 February 2012] |
| Chicago | "NBO", http://www.acronymgeek.com/NBO (accessed February 14, 2012). |
| CBE/CSE | NBO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/NBO. |
| Bluebook | NBO, http://www.acronymgeek.com/NBO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NBO, http://www.acronymgeek.com/NBO (optional description here) (as of Feb. 14, 2012, 04:24). |
| AMA | NBO. Acronym Geek. February 14, 2012, 04:24. Available at: http://www.acronymgeek.com/NBO. Accessed February 14, 2012, 04:24. |