DOYLE, A. .. (2007). FOUR SHERLOCK HOLMES MYSTERIES. SCHOLASTIC REFERENCE.
Cita Chicago (17th ed.)DOYLE, ARTHUR .CONAN. FOUR SHERLOCK HOLMES MYSTERIES. SCHOLASTIC REFERENCE, 2007.
Cita MLA (9th ed.)DOYLE, ARTHUR .CONAN. FOUR SHERLOCK HOLMES MYSTERIES. SCHOLASTIC REFERENCE, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.