APA (7th ed.) Citation

Grünenfelder, J., & Wolgensinger, M. (1976). Cathedrals of Europe. Crowell.

Chicago Style (17th ed.) Citation

Grünenfelder, Josef, and Michael Wolgensinger. Cathedrals of Europe. New York: Crowell, 1976.

MLA (9th ed.) Citation

Grünenfelder, Josef, and Michael Wolgensinger. Cathedrals of Europe. Crowell, 1976.

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