The Collected Works of L. S. Vygotsky. Volume 1: Problems of General Psychology. Including the Volume Thinking and Speech. L. S. Vygotsky , Robert W. Rieber , Aaron S. Carton , Norris MinickThe Collected Works of L. S. Vygotsky. Volume 2: The Fundamentals of Defectology (Abnormal Psychology and Learning Disabilities). L. S. Vygotsky , Robert W. Rieber , Aaron S. Carton , Jane E. Knox , Carol B. StevensUnderstanding Vygotsky: A Quest for Synthesis. Rene van der Veer , Jaan Valsiner