Otto Klein - Restaurator.

MLA

Baldegger, Markus, and Jörg Hejkal. Otto Klein - Restaurator. Berlin: Hanstein Verlag, 1994.

APA

Baldegger, M., & Hejkal, J. (1994). Otto Klein - Restaurator. Berlin: Hanstein Verlag.

Chicago

Baldegger, Markus, and Jörg Hejkal. Otto Klein - Restaurator. Berlin: Hanstein Verlag, 1994.