APA (7th ed.) Citation

Curran, J., & Christie, A. (2009). Agatha Christie's secret notebooks: Fifty years of mysteries in the making. Harper.

Chicago Style (17th ed.) Citation

Curran, John, and Agatha Christie. Agatha Christie's Secret Notebooks: Fifty Years of Mysteries in the Making. New York: Harper, 2009.

MLA (8th ed.) Citation

Curran, John, and Agatha Christie. Agatha Christie's Secret Notebooks: Fifty Years of Mysteries in the Making. Harper, 2009.

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