Why doesn't this cite with an URL appear in my citations?

I’m writing my master thesis and besides scientific articles I want to cite one URL from the web. However, when I attempt to do that, my latex compiles all the cite sources besides the one that has an url.

I followed this tutorial: https://engineering.purdue.edu/~mark/puthesis/faq/cite-url/

However, no luck, the text above that is in my "Cite.bib" file doesn’t get shown, only other cites.

@misc{Senn:2009,
      title  = "Using {LaTeX} for Your Thesis",
      author = "Mark Senn",
      url    = "http://engineering.purdue.edu/~mark/puthesis",
      year   = "2009 (accessed February 3, 2014)"
    }

Also, I tried the top comment from this example but it doesn’t work, everything compiles and nothing happens…

How can I use BibTeX to cite a web page?