| APA | HBFO. (2012, February 17). In Acronym Geek. Retrieved 02:11, February 17, 2012, from http://www.acronymgeek.com/HBFO |
| MLA | "HBFO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HBFO>. |
| MHRA | 'HBFO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HBFO> [accessed 17 February 2012] |
| Chicago | "HBFO", http://www.acronymgeek.com/HBFO (accessed February 17, 2012). |
| CBE/CSE | HBFO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HBFO. |
| Bluebook | HBFO, http://www.acronymgeek.com/HBFO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HBFO, http://www.acronymgeek.com/HBFO (optional description here) (as of Feb. 17, 2012, 02:11). |
| AMA | HBFO. Acronym Geek. February 17, 2012, 02:11. Available at: http://www.acronymgeek.com/HBFO. Accessed February 17, 2012, 02:11. |