APA (7th ed.) Citation

Grünenfelder, J., & Wolgensinger, M. (1973). Cathédrales. Silva.

Chicago Style (17th ed.) Citation

Grünenfelder, Josef, and Michael Wolgensinger. Cathédrales. Zurich: Silva, 1973.

MLA (9th ed.) Citation

Grünenfelder, Josef, and Michael Wolgensinger. Cathédrales. Silva, 1973.

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