Gaya APA
Christie, Agatha. (1950).
Dumb Witness .
London:
Pan Books.
Gaya Chicago
Christie, Agatha.
Dumb Witness.
London:
Pan Books,
1950.
Text.
Gaya MLA
Christie, Agatha.
Dumb Witness.
London:
Pan Books,
1950.
Text.
Gaya Turabian
Christie, Agatha.
Dumb Witness.
London:
Pan Books,
1950.
Print.