APA Style
Christie, Agatha. (1929).
The Seven Days Mystery (1971).
:
Fontana Books.
Chicago Style
Christie, Agatha.
The Seven Days Mystery.
1971
:
Fontana Books,
1929.
Text.
MLA Style
Christie, Agatha.
The Seven Days Mystery.
1971
:
Fontana Books,
1929.
Text.
Turabian Style
Christie, Agatha.
The Seven Days Mystery.
1971
:
Fontana Books,
1929.
Print.