Portal:Reference works

General encyclopedias

• The American Cyclopædia (1879)
• The New International Encyclopædia (1905)
• The Nuttall Encyclopædia (1907)
• The Encyclopedia Americana (1906)
• The Encyclopedia Americana (1920)
• Collier's New Encyclopedia (1921)

Encyclopædia Britannica

• Encyclopædia Britannica, Ninth Edition (1875–1889)

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• 1902 Encyclopædia Britannica (10th ed., supplement to the 9th)
• 1911 Encyclopædia Britannica
• 1922 Encyclopædia Britannica

Literature

• Literary Research Guide (2017)

Places

• Kansas: A Cyclopedia of State History

Biography

• See Portal:Biography

Young people

• The New Student's Reference Work

Religion

• See a list of encyclopaedias on religion at Wikipedia.
• Catholic Encyclopedia, 1913
• Easton's Bible Dictionary
• Jewish Encyclopedia

Music

• A Dictionary of Music and Musicians
• University Musical Encyclopedia

History

• A Dictionary of Greek and Roman Antiquities

Botany

• Twelve edible mushrooms of the United States

Classification

• ICD-10-CM (2010)

About

• "Cyclopædia," in Collier's New Encyclopedia, New York: P. F. Collier & Son Co. (1921)
• "Encyclopædia," in The Encyclopedia Americana, New York: The Encyclopedia Americana Corporation (1920)
• "Encyclopædia," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Encyclopaedia," in Encyclopædia Britannica (11th ed., 1911)
• "Encyclopædia," in The Nuttall Encyclopædia, (ed.) by James Wood, London: Frederick Warne and Co., Ltd. (1907)
• "Encyclopædia," in The New International Encyclopædia, New York: Dodd, Mead and Co. (1905)
• "Cyclopædia," in The American Cyclopædia (1879)