BibTeX

• What is free software? (Stallman and contributors, n.d.)
  

  @Misc{stallman-c,
    author       = {Richard Stallman and {contributors}},
    title        = {What is Free Software?},
    url          = {https://www.gnu.org/philosophy/free-sw.en.html},
    keywords     = {free-software},
    publisher    = {Free Software Foundation}
  }