APA (7th ed.) Citation

Beaumont, C. W. (1967). The history of harlequin. B. Blom.

Chicago Style (17th ed.) Citation

Beaumont, Cyril W. The History of Harlequin. New York: B. Blom, 1967.

MLA (9th ed.) Citation

Beaumont, Cyril W. The History of Harlequin. B. Blom, 1967.