APA (7th ed.) Citation

Hardon, J. A. (1969). The Protestant churches of America (Rev. ed.). Image Books.

Chicago Style (17th ed.) Citation

Hardon, John A. The Protestant Churches of America. Rev. ed. Garden City, N.Y.: Image Books, 1969.

MLA (8th ed.) Citation

Hardon, John A. The Protestant Churches of America. Rev. ed. Image Books, 1969.