APA (7th ed.) Citation

Agatha Christie. (2016). Closed Casket (1.). Harper Collins.

Chicago Style (17th ed.) Citation

Agatha Christie. Closed Casket. 1. Harper Collins, 2016.

MLA (9th ed.) Citation

Agatha Christie. Closed Casket. 1. Harper Collins, 2016.

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