APA (7th ed.) Citation

Smith, C. S., & Hawthorne, J. G. (1974). Mappae clavicula: A little key to the world of Medieval techniques.

Chicago Style (17th ed.) Citation

Smith, Cyril Stanley, and John G. Hawthorne. Mappae Clavicula: A Little Key to the World of Medieval Techniques. Philadelphia, 1974.

MLA (9th ed.) Citation

Smith, Cyril Stanley, and John G. Hawthorne. Mappae Clavicula: A Little Key to the World of Medieval Techniques. 1974.