APA (7th ed.) Citation

James, H., & Lubbock, P. (1920). The letters of Henry James. Macmillan.

Chicago Style (17th ed.) Citation

James, Henry, and Percy Lubbock. The Letters of Henry James. London: Macmillan, 1920.

MLA (9th ed.) Citation

James, Henry, and Percy Lubbock. The Letters of Henry James. Macmillan, 1920.