| APA | ZREF. (2012, February 16). In Acronym Geek. Retrieved 16:05, February 16, 2012, from http://www.acronymgeek.com/ZREF |
| MLA | "ZREF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ZREF>. |
| MHRA | 'ZREF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ZREF> [accessed 16 February 2012] |
| Chicago | "ZREF", http://www.acronymgeek.com/ZREF (accessed February 16, 2012). |
| CBE/CSE | ZREF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ZREF. |
| Bluebook | ZREF, http://www.acronymgeek.com/ZREF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZREF, http://www.acronymgeek.com/ZREF (optional description here) (as of Feb. 16, 2012, 16:05). |
| AMA | ZREF. Acronym Geek. February 16, 2012, 16:05. Available at: http://www.acronymgeek.com/ZREF. Accessed February 16, 2012, 16:05. |