Putnam, R. D. (2020). Bowling alone: The collapse and revival of American community (Revised and updated, Simon & Schuster trade paperback edition, 20th anniversary edition.). Simon & Schuster Paperbacks.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPutnam, Robert D. Bowling Alone: The Collapse and Revival of American Community. Revised and updated, Simon & Schuster trade paperback edition, 20th anniversary edition. New York: Simon & Schuster Paperbacks, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPutnam, Robert D. Bowling Alone: The Collapse and Revival of American Community. Revised and updated, Simon & Schuster trade paperback edition, 20th anniversary edition. Simon & Schuster Paperbacks, 2020.
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