Cita APA (7a ed.)

Hollingworth, H. L. (1930). Abnormal psychology; its concepts and theories. The Ronald press company.

Cita Chicago Style (17a ed.)

Hollingworth, Harry L. Abnormal Psychology; Its Concepts and Theories. New York: The Ronald press company, 1930.

Cita MLA (8a ed.)

Hollingworth, Harry L. Abnormal Psychology; Its Concepts and Theories. The Ronald press company, 1930.