APA (7th ed.) Citation

Zürich, G. +. C. Heinz Ryf.

Chicago Style (17th ed.) Citation

Zürich, Gaechter + Clahsen. Heinz Ryf.

MLA (8th ed.) Citation

Zürich, Gaechter + Clahsen. Heinz Ryf.

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