Stroud, J. (2013). Lockwood & Co. - The Screaming Staircase. Random House Children's Publisher.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStroud, Jonathan. Lockwood & Co. - The Screaming Staircase. London: Random House Children's Publisher, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रStroud, Jonathan. Lockwood & Co. - The Screaming Staircase. Random House Children's Publisher, 2013.
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