APA (7th ed.) Citation

Shakespeare, W., Clarke, W. G., & Wright, W. A. (1971). The plays and sonnets of William Shakespeare. Encyclopaedia Britannica [etc.].

Chicago Style (17th ed.) Citation

Shakespeare, William, William George Clarke, and William Aldis Wright. The Plays and Sonnets of William Shakespeare. Chicago [etc.]: Encyclopaedia Britannica [etc.], 1971.

MLA (9th ed.) Citation

Shakespeare, William, et al. The Plays and Sonnets of William Shakespeare. Encyclopaedia Britannica [etc.], 1971.