Polenberg, R. (1980). One nation divisible: Class, race and ethnicity in the United States since 1938. Harmondsworth: Penguin Books.
Citazione stile Chigago Style (17a edizione)Polenberg, Richard. One Nation Divisible: Class, Race and Ethnicity in the United States Since 1938. Harmondsworth: Penguin Books, 1980.
Citatione MLA (8a ed.)Polenberg, Richard. One Nation Divisible: Class, Race and Ethnicity in the United States Since 1938. Harmondsworth: Penguin Books, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.