Raymond Breton, National Survival in Dependent Societies: Social Change in Canada and Poland, McGill-Queen's Press - MQUP, 1990, p. 106,ISBN0-88629-127-5Google Books
John Blacking, Anna Czekanowska, Polish Folk Music: Slavonic Heritage - Polish Tradition - Contemporary Trends, Cambridge University Press, 2006, p. 3,
ISBN0-521-02797-7Google Books
Regina E. Holloman, Serghei A. Arutiunov, Perspectives on Ethnicity, Walter de Gruyter 1978, p. 391, ISBN311080770X, 9783110807707 Google Books
