Arthur, R. (1974). Alfred Hitchcock and the three investigators in The mystery of the talking skull. MCMLXX.
Citace podle Chicago (17th ed.)Arthur, Robert. Alfred Hitchcock and the Three Investigators in The Mystery of the Talking Skull. London: MCMLXX, 1974.
Citace podle MLA (9th ed.)Arthur, Robert. Alfred Hitchcock and the Three Investigators in The Mystery of the Talking Skull. MCMLXX, 1974.
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