APA Style
Doyle, Arthur Conan. (2019).
The valley of fear .
Milton Keynes:
Penguin English Library.
Chicago Style
Doyle, Arthur Conan.
The valley of fear.
Milton Keynes:
Penguin English Library,
2019.
Text.
MLA Style
Doyle, Arthur Conan.
The valley of fear.
Milton Keynes:
Penguin English Library,
2019.
Text.
Turabian Style
Doyle, Arthur Conan.
The valley of fear.
Milton Keynes:
Penguin English Library,
2019.
Print.