APA (7th ed.) Citation

Cowles, F. I., & Harding, G. R. (1937). Harlequinade: The fantastic history of Harlequin and Columbine. F. Muller.

Chicago Style (17th ed.) Citation

Cowles, Frederick Ignatius, and Grace Reed Harding. Harlequinade: The Fantastic History of Harlequin and Columbine. London: F. Muller, 1937.

MLA (9th ed.) Citation

Cowles, Frederick Ignatius, and Grace Reed Harding. Harlequinade: The Fantastic History of Harlequin and Columbine. F. Muller, 1937.