Polenberg, R. (1980). One nation divisible: Class, race, and ethnicity in the United States since 1938. Penguin Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPolenberg, Richard. One Nation Divisible: Class, Race, and Ethnicity in the United States Since 1938. Harmondsworth, Eng. ; New York: Penguin Books, 1980.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPolenberg, Richard. One Nation Divisible: Class, Race, and Ethnicity in the United States Since 1938. Penguin Books, 1980.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.