Cita APA (7a ed.)

Hallowell, E. M. (1997). Worry: Controlling it and using it wisely. Ballantine.

Cita Chicago Style (17a ed.)

Hallowell, Edward M. Worry: Controlling It and Using It Wisely. New York: Ballantine, 1997.

Cita MLA (9a ed.)

Hallowell, Edward M. Worry: Controlling It and Using It Wisely. Ballantine, 1997.