APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.