For research purposes, Google or Wikipedia or similar sites are neither recommended nor acceptable (to most authorities) citations. This is because sources such as Wikipedia can be edited by anybody (though the mistake or incorrect information may be corrected later on) and hence should only be used as a starting point.
It is recommended that you use a published and reviewed work, such as dissertation theses, journal articles, books, or reports from reputed agencies and organizations, etc. For example, in this case, a Google Scholar search for "Culture" presented a number of research papers and books that can be cited.
Now, how you cite a particular source depends upon the citation style you need to use. The citation styles are dictated by your organization (university, etc.) or publishing agency where you want your work to be published. Please check with the relevant agency for the citation style. You can also refer to the MLA format presented in the previous answer to your question by Kristen.
Hope this helps.