2 Quotes & Sayings By Piotr Ryczko

Piotr Ryczko is a well-known professional in the field of psychology, author of more than 100 scientific papers, and a popular lecturer in Poland. He has been one of the most well-known Polish experts on the phenomenon of human relationships for over twenty years. He has also been a lecturer in many other countries, including England, Germany, Spain, France, Switzerland, Denmark, Sweden, the United States.