APA (7th ed.) Citation

Gregor, J. (1968). Masks of the world: An historical and pictorial survey of many types & times. B. Blom.

Chicago Style (17th ed.) Citation

Gregor, Joseph. Masks of the World: An Historical and Pictorial Survey of Many Types & Times. New York: B. Blom, 1968.

MLA (9th ed.) Citation

Gregor, Joseph. Masks of the World: An Historical and Pictorial Survey of Many Types & Times. B. Blom, 1968.