APA (7th ed.) Citation

Barth, K. (1964). Evangelical theology: An introduction. Doubleday.

Chicago Style (17th ed.) Citation

Barth, Karl. Evangelical Theology: An Introduction. Garden City, N. Y.: Doubleday, 1964.

MLA (8th ed.) Citation

Barth, Karl. Evangelical Theology: An Introduction. Doubleday, 1964.