| Style | Reference Text |
|---|
| APA | 21CN. (2013, May 18). In All Acronyms. Retrieved 17:24, May 18, 2013, from http://www.all-acronyms.com/21CN |
| MLA | "21CN." All Acronyms. 18 May 2013, 17:24. All Acronyms. 18 May 2013 <http://www.all-acronyms.com/21CN>. |
| MHRA | '21CN', All Acronyms, 18 May 2013, 17:24, <http://www.all-acronyms.com/21CN> [accessed 18 May 2013] |
| Chicago | "21CN," http://www.all-acronyms.com/21CN (accessed May 18, 2013). |
| CBE/CSE | 21CN [Internet]. All Acronyms; 2013 May 18, 17:24 [cited 2013 May 18]. Available from: http://www.all-acronyms.com/21CN. |
| Bluebook | 21CN, http://www.all-acronyms.com/21CN (last visited May 18, 2013). |
| Bluebook: Harvard JOLT | See All Acronyms, 21CN, http://www.all-acronyms.com/21CN (optional description here) (as of May. 18, 2013, 17:24). |
| AMA | 21CN. All Acronyms. May 18, 2013, 17:24. Available at: http://www.all-acronyms.com/21CN. Accessed May 18, 2013. |
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