APA (7th ed.) Citation

Christie, A. (1961). Black coffee: A mystery play in three acts. S. French.

Chicago Style (17th ed.) Citation

Christie, Agatha. Black Coffee: A Mystery Play in Three Acts. New York: S. French, 1961.

MLA (9th ed.) Citation

Christie, Agatha. Black Coffee: A Mystery Play in Three Acts. S. French, 1961.

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