APA (7th ed.) Citation

Christie, A. (1984). The secret of chimneys (3a ed.). [s.n.].

Chicago Style (17th ed.) Citation

Christie, Agatha. The Secret of Chimneys. 3a ed. New York: [s.n.], 1984.

MLA (9th ed.) Citation

Christie, Agatha. The Secret of Chimneys. 3a ed. [s.n.], 1984.