Cita APA (7a ed.)

Williams, T. A. (1979). Mental health in the 21st century. Lexington Books.

Cita Chicago Style (17a ed.)

Williams, Thomas Arthur. Mental Health in the 21st Century. Lexington, Mass. [u.a.]: Lexington Books, 1979.

Cita MLA (9a ed.)

Williams, Thomas Arthur. Mental Health in the 21st Century. Lexington Books, 1979.