Fretz, J. W. (1962). Immigrant group settlements in Paraguay: A study in the sociology of colonization. Bethel College.
Citazione stile Chigago Style (17a edizione)Fretz, J. Winfield. Immigrant Group Settlements in Paraguay: A Study in the Sociology of Colonization. North Newton, Kansas: Bethel College, 1962.
Citatione MLA (8a ed.)Fretz, J. Winfield. Immigrant Group Settlements in Paraguay: A Study in the Sociology of Colonization. Bethel College, 1962.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.