APA (7th ed.) Citation

Wallen, R. W. (1956). Clinical psychology: The study of persons. McGraw-Hill.

Chicago Style (17th ed.) Citation

Wallen, Richard W. Clinical Psychology: The Study of Persons. New York: McGraw-Hill, 1956.

MLA (9th ed.) Citation

Wallen, Richard W. Clinical Psychology: The Study of Persons. McGraw-Hill, 1956.