Stroud, J. (2013). Lockwood & Co. - The Screaming Staircase. Random House Children's Publisher.
Lua i Stíl Chicago (17ú heag.)Stroud, Jonathan. Lockwood & Co. - The Screaming Staircase. London: Random House Children's Publisher, 2013.
Lua MLA (9ú heag.)Stroud, Jonathan. Lockwood & Co. - The Screaming Staircase. Random House Children's Publisher, 2013.
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