Cita APA (7th ed.)

Harris, T. A. (1969). I'm OK, you're OK: A practical guide to transactional analysis. National Book Store.

Cita Chicago (17th ed.)

Harris, Thomas Anthony. I'm OK, You're OK: A Practical Guide to Transactional Analysis. Manila: National Book Store, 1969.

Cita MLA (9th ed.)

Harris, Thomas Anthony. I'm OK, You're OK: A Practical Guide to Transactional Analysis. National Book Store, 1969.