| APA | ZRDF. (2012, February 14). In Acronym Geek. Retrieved 21:14, February 14, 2012, from http://www.acronymgeek.com/ZRDF |
| MLA | "ZRDF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ZRDF>. |
| MHRA | 'ZRDF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ZRDF> [accessed 14 February 2012] |
| Chicago | "ZRDF", http://www.acronymgeek.com/ZRDF (accessed February 14, 2012). |
| CBE/CSE | ZRDF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ZRDF. |
| Bluebook | ZRDF, http://www.acronymgeek.com/ZRDF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZRDF, http://www.acronymgeek.com/ZRDF (optional description here) (as of Feb. 14, 2012, 21:14). |
| AMA | ZRDF. Acronym Geek. February 14, 2012, 21:14. Available at: http://www.acronymgeek.com/ZRDF. Accessed February 14, 2012, 21:14. |