Freeman, R. A. The Adventures of Dr. Thorndyke (The Singing Bone).
Lua i Stíl Chicago (17ú heag.)Freeman, R. Austin. The Adventures of Dr. Thorndyke (The Singing Bone).
Lua MLA (9ú heag.)Freeman, R. Austin. The Adventures of Dr. Thorndyke (The Singing Bone).
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