Cita APA (7a ed.)

Berkley, G. (1940). The principles of human knowledge. The open court publishing company.

Cita Chicago Style (17a ed.)

Berkley, George. The Principles of Human Knowledge. Illinois: The open court publishing company, 1940.

Cita MLA (8a ed.)

Berkley, George. The Principles of Human Knowledge. The open court publishing company, 1940.