Arthur Conan Doyle. Sign of the Four. DC Books.
Chicago Edition CitationArthur Conan Doyle. Sign of the Four. Kottayam: DC Books.
MLA引文Arthur Conan Doyle. Sign of the Four. DC Books.
警告：這些引文格式不一定是100％准確.
APA引文
Arthur Conan Doyle. Sign of the Four. DC Books.
Chicago Edition CitationArthur Conan Doyle. Sign of the Four. Kottayam: DC Books.
MLA引文Arthur Conan Doyle. Sign of the Four. DC Books.