Cita APA (7th ed.)

Sixth National Conference on Clays and Clay Minerals. (1957). Clays and clay minerals. Pergamon Press.

Cita Chicago (17th ed.)

Sixth National Conference on Clays and Clay Minerals. Clays and Clay Minerals. New York: Pergamon Press, 1957.

Cita MLA (9th ed.)

Sixth National Conference on Clays and Clay Minerals. Clays and Clay Minerals. Pergamon Press, 1957.