APA (7th ed.) Citation

Calkins, M. W. (1901). An introduction to psychology. The MacMillan Company.

Chicago Style (17th ed.) Citation

Calkins, Mary Whiton. An Introduction to Psychology. New York : London: The MacMillan Company, 1901.

MLA (9th ed.) Citation

Calkins, Mary Whiton. An Introduction to Psychology. The MacMillan Company, 1901.

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