Weeks, M. (2014). Heads up psychology (First American edition.). DK Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWeeks, Marcus. Heads Up Psychology. First American edition. New York, New York: DK Publishing, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWeeks, Marcus. Heads Up Psychology. First American edition. DK Publishing, 2014.
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