APA (7th ed.) Citation

Hartwell, H. (1964). The theology of Karl Barth: An introduction. Duckworth.

Chicago Style (17th ed.) Citation

Hartwell, Herbert. The Theology of Karl Barth: An Introduction. London: Duckworth, 1964.

MLA (9th ed.) Citation

Hartwell, Herbert. The Theology of Karl Barth: An Introduction. Duckworth, 1964.

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