Cita APA (7th ed.)

Schmidt, L. A., & Schulkin, J. (1999). Extreme fear, shyness, and social phobia: Origins, biological mechanisms, and clinical outcomes. Oxford University Press.

Cita Chicago (17th ed.)

Schmidt, Louis A., i Jay Schulkin. Extreme Fear, Shyness, and Social Phobia: Origins, Biological Mechanisms, and Clinical Outcomes. New York: Oxford University Press, 1999.

Cita MLA (9th ed.)

Schmidt, Louis A., i Jay Schulkin. Extreme Fear, Shyness, and Social Phobia: Origins, Biological Mechanisms, and Clinical Outcomes. Oxford University Press, 1999.