APA (7th ed.) Citation

Butler, G. (1969). Coffin's dark number. Bles.

Chicago Style (17th ed.) Citation

Butler, Gwendoline. Coffin's Dark Number. London: Bles, 1969.

MLA (8th ed.) Citation

Butler, Gwendoline. Coffin's Dark Number. Bles, 1969.

Warning: These citations may not always be 100% accurate.