APA (7th ed.) Citation

Hefele, K. J., & Clark, W. R. (1871). A history of the Christian councils.

Chicago Style (17th ed.) Citation

Hefele, Karl Joseph, and William R. Clark. A History of the Christian Councils. Edinburgh, 1871.

MLA (9th ed.) Citation

Hefele, Karl Joseph, and William R. Clark. A History of the Christian Councils. 1871.

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