APA (7th ed.) Citation

Rogers, D. W., & Rogers, I. A. (1980). J.R.R. Tolkien. Twayne.

Chicago Style (17th ed.) Citation

Rogers, Deborah Webster, and Ivor A. Rogers. J.R.R. Tolkien. Boston: Twayne, 1980.

MLA (9th ed.) Citation

Rogers, Deborah Webster, and Ivor A. Rogers. J.R.R. Tolkien. Twayne, 1980.