APA (7th ed.) Citation

Harris, T. A. (1969). I’m OK - you’re OK: A practical guide to transactional analysis. Harper & Row, Publ..

Chicago Style (17th ed.) Citation

Harris, Thomas A. I’m OK - You’re OK: A Practical Guide to Transactional Analysis. New York: Harper & Row, Publ., 1969.

MLA (8th ed.) Citation

Harris, Thomas A. I’m OK - You’re OK: A Practical Guide to Transactional Analysis. Harper & Row, Publ., 1969.