References
- Ego State Therapy International. (n.d.). http://www.meisa.biz/ego-state-therapy-international---esti.php (http://www.meisa.biz/ego-state-therapy-international---esti.php)
- Watkins , J. G. and Watkins , H. H. 1979 . “ The theory and practice of ego-state therapy ” . In Short term approaches to psychotherapy , Edited by: Grayson , H. 176 – 220 . New York , NY : Human Sciences Press. .
- Watkins , J. G. and Watkins , H. H. 1979–1980 . Ego states and hidden observers . Journal of Altered States of Consciousness , 5 : 3 – 18 .