APA (7th ed.) Citation

Coleridge, S. T., & Richards, I. A. (1978). The portable Coleridge. Penguin.

Chicago Style (17th ed.) Citation

Coleridge, Samuel Taylor, and I. A. Richards. The Portable Coleridge. Harmondsworth: Penguin, 1978.

MLA (9th ed.) Citation

Coleridge, Samuel Taylor, and I. A. Richards. The Portable Coleridge. Penguin, 1978.