APA (7th ed.) Citation

Hollingworth, H. L. (1928). Psychology: Its facts and principles. D. Appleton and Company.

Chicago Style (17th ed.) Citation

Hollingworth, Harry L. Psychology: Its Facts and Principles. New York ; London: D. Appleton and Company, 1928.

MLA (9th ed.) Citation

Hollingworth, Harry L. Psychology: Its Facts and Principles. D. Appleton and Company, 1928.

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