| APA | HAFO. (2012, February 16). In Acronym Geek. Retrieved 09:39, February 16, 2012, from http://www.acronymgeek.com/HAFO |
| MLA | "HAFO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HAFO>. |
| MHRA | 'HAFO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HAFO> [accessed 16 February 2012] |
| Chicago | "HAFO", http://www.acronymgeek.com/HAFO (accessed February 16, 2012). |
| CBE/CSE | HAFO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HAFO. |
| Bluebook | HAFO, http://www.acronymgeek.com/HAFO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HAFO, http://www.acronymgeek.com/HAFO (optional description here) (as of Feb. 16, 2012, 09:39). |
| AMA | HAFO. Acronym Geek. February 16, 2012, 09:39. Available at: http://www.acronymgeek.com/HAFO. Accessed February 16, 2012, 09:39. |