A study in scarlet :
the first book about Sherlock Holmes /
by A. Conan Doyle ; [introductory essay by Joseph Bell].

APA Citation

Doyle, A. Conan. (191). A study in scarlet: the first book about Sherlock Holmes. London: Ward, Lock, & Co., Ltd..

MLA Citation

Doyle, Arthur Conan, 1859-1930. A Study In Scarlet: the First Book About Sherlock Holmes. London: Ward, Lock, & Co., Ltd., 191.

Warning: These citations may not always be complete (especially for serials).