| APA | ZIP. (2012, February 9). In Acronym Geek. Retrieved 20:35, February 9, 2012, from http://www.acronymgeek.com/ZIP |
| MLA | "ZIP." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/ZIP>. |
| MHRA | 'ZIP', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/ZIP> [accessed 9 February 2012] |
| Chicago | "ZIP", http://www.acronymgeek.com/ZIP (accessed February 9, 2012). |
| CBE/CSE | ZIP [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/ZIP. |
| Bluebook | ZIP, http://www.acronymgeek.com/ZIP (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZIP, http://www.acronymgeek.com/ZIP (optional description here) (as of Feb. 9, 2012, 20:35). |
| AMA | ZIP. Acronym Geek. February 9, 2012, 20:35. Available at: http://www.acronymgeek.com/ZIP. Accessed February 9, 2012, 20:35. |