Skinner, B. F. (2005). Walden Two: With a new preface by the author. Hackett Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSkinner, B. F. Walden Two: With a New Preface by the Author. Indianapolis,IN.: Hackett Publishing, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSkinner, B. F. Walden Two: With a New Preface by the Author. Hackett Publishing, 2005.
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