Reference

• USA.gov Directories

  Official U.S. government services and information directory.

  https://www.usa.gov/ · 258 clicks

• edX Education

  Online courses from universities, founded by Harvard and MIT.

  https://www.edx.org/ · 29 clicks

• Yellow Pages Directories

  Online business directory.

  https://www.yellowpages.com/ · 202 clicks

• Merriam-Webster Reference

  Online dictionary and thesaurus.

  https://www.merriam-webster.com/ · 131 clicks

• AbeBooks Books

  Marketplace for new, used, and rare books.

  https://www.abebooks.com/ · 85 clicks

• Purdue OWL Education

  Free writing and citation style guides.

  https://owl.purdue.edu/ · 274 clicks

• Library of Congress Reference

  The U.S. national library's collections and research resources.

  https://www.loc.gov/ · 21 clicks

• Wikipedia Featured Reference

  Free, community-edited online encyclopedia.

  https://www.wikipedia.org/ · 36 clicks

• WorldCat Directories

  Global catalog of library collections.

  https://www.worldcat.org/ · 272 clicks

• Yelp Directories

  Business reviews and local search.

  https://www.yelp.com/ · 394 clicks

• Google Scholar Education

  Search engine for academic papers and citations.

  https://scholar.google.com/ · 693 clicks

• Data.gov Directories

  U.S. government open data portal.

  https://www.data.gov/ · 664 clicks