Reference.com is a multi-source encyclopedia search that is produced by Lexico Publishing Group, which is a leading provider of language reference products and services on the Internet.
Reference.com does not produce the encyclopedias that appear on the site. They are more like a bookstore or library than a publisher. The best part is that the source of each entry is given immediately after the entry is made. Some of the encyclopedias that appear at the site are The Columbia Encyclopedia, Countries and Their Cultures, The Gale Encyclopedia of Busine$$ and Finance, The Gale Encyclopedia of Children’s Health: Infancy Through Adolescence, The Gale Encyclopedia of Mental Disorders, The Gale Encyclopedia of Surgery: A Guide For Patients And Caregivers, Encyclopedia of Small Business, Nutrition and Well-Being A to Z, Junior Worldmark Encyclopedia of Foods and Recipes of the World, Gale Encyclopedia of Everyday Law, Chemical Elements: From Carbon to Krypton, Wikipedia and Lexico’s On This Day. 
