Jeffrey Kottler is Professor and Chair of the Counselling Department at California State University, Fullerton and has written more than 50 books in psychology, counselling, and re...lihat lebih banyakJeffrey Kottler is Professor and Chair of the Counselling Department at California State University, Fullerton and has written more than 50 books in psychology, counselling, and related fields.lihat lebih sedikit