APA (7th ed.) Citation

Lund, F. H. (1927). Psychology: The science of mental activity. A.G. Seiler.

Chicago Style (17th ed.) Citation

Lund, Frederick H. Psychology: The Science of Mental Activity. New York: A.G. Seiler, 1927.

MLA (9th ed.) Citation

Lund, Frederick H. Psychology: The Science of Mental Activity. A.G. Seiler, 1927.