Windows on the World (OK Corral)

English, F. (1975) I’m OK - You’re OK (Adult) Transactional Analysis Journal No 5:4 October 1975

Ernst, F. H.  (1971) The OK corral: The grid for get-on-with. Transactional Analysis Journal,1 (4)

Harris, T. (1967) I’m OK You’re OK.  Arrow Books 1995

Thomas, A.  (1967)  I’m OK You’re OK.  Arrow Books