| APA | HKDF. (2012, February 15). In Acronym Geek. Retrieved 11:21, February 15, 2012, from http://www.acronymgeek.com/HKDF |
| MLA | "HKDF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HKDF>. |
| MHRA | 'HKDF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HKDF> [accessed 15 February 2012] |
| Chicago | "HKDF", http://www.acronymgeek.com/HKDF (accessed February 15, 2012). |
| CBE/CSE | HKDF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HKDF. |
| Bluebook | HKDF, http://www.acronymgeek.com/HKDF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HKDF, http://www.acronymgeek.com/HKDF (optional description here) (as of Feb. 15, 2012, 11:21). |
| AMA | HKDF. Acronym Geek. February 15, 2012, 11:21. Available at: http://www.acronymgeek.com/HKDF. Accessed February 15, 2012, 11:21. |