APA (7th ed.) Citation

Castle, A., & Castle, E. (1912). The grip of life. Macmillan.

Chicago Style (17th ed.) Citation

Castle, Agnes, and Egerton Castle. The Grip of Life. London: Macmillan, 1912.

MLA (8th ed.) Citation

Castle, Agnes, and Egerton Castle. The Grip of Life. Macmillan, 1912.

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