Gaya APA
Christie, Agatha. (1925).
The secret of chimneys .
London:
HarperCollins Publishers.
Gaya Chicago
Christie, Agatha.
The secret of chimneys.
London:
HarperCollins Publishers,
1925.
Text.
Gaya MLA
Christie, Agatha.
The secret of chimneys.
London:
HarperCollins Publishers,
1925.
Text.
Gaya Turabian
Christie, Agatha.
The secret of chimneys.
London:
HarperCollins Publishers,
1925.
Print.