APA (7th ed.) Citation

Benton, W. P. Encyclopaedia Britannica 21: Sordello to Textbooks.

Chicago Style (17th ed.) Citation

Benton, William. Publisher. Encyclopaedia Britannica 21: Sordello to Textbooks. Chicago : Encyclopaedia Britannica, Inc.

MLA (8th ed.) Citation

Benton, William. Publisher. Encyclopaedia Britannica 21: Sordello to Textbooks.

Warning: These citations may not always be 100% accurate.