APA Edition Citation

Encyclopedia britanica. (1971). Encyclopedia britanica: Index to vilumes 1 to 23. William benton.

Chicago Edition Citation

Encyclopedia britanica. Encyclopedia Britanica: Index to Vilumes 1 to 23. London: William benton, 1971.

MLA Edition Citation

Encyclopedia britanica. Encyclopedia Britanica: Index to Vilumes 1 to 23. William benton, 1971.

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