Tom Berk (2011). Over groepstherapie, groepen, groepsdynamiek, groepsanalyse en wat therapeutisch werkt en Tom Berk (2011). Psychodynamische therapie in context
The tPeP (Journal Person-centered experiential Psychotherapy) is the scientific journal for Dutch and Flemish psychotherapists, psychologists, and psychiatrists, that work from, or are interested in a client-centered perspective.