Sheldon, S. (2006). Bóng tối kinh hoàng [tiểu thuyết]. Hà Nội: Văn học.
শিকাগো স্টাইলে সাইটেশনSheldon, Sidney. Bóng Tối Kinh Hoàng [tiểu Thuyết]. Hà Nội: Văn học, 2006.
এমএলএ সাইটেশনSheldon, Sidney. Bóng Tối Kinh Hoàng [tiểu Thuyết]. Hà Nội: Văn học, 2006.
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