APA (7th ed.) Citation

Castle, A., & Castle, E. Little hours in great days. Constable.

Chicago Style (17th ed.) Citation

Castle, Agnes, and Egerton Castle. Little Hours in Great Days. London: Constable.

MLA (8th ed.) Citation

Castle, Agnes, and Egerton Castle. Little Hours in Great Days. Constable.

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