Bernd and Hilla Becher : Framework houses of the Siegen industrial region.

MLA

Becher, Bernd, and Hilla Becher. Bernd and Hilla Becher : Framework Houses of the Siegen Industrial Region. München: Schirmer/Mosel, 1977.

APA

Becher, B., & Becher, H. (1977). Bernd and Hilla Becher : Framework houses of the Siegen industrial region. München: Schirmer/Mosel.

Chicago

Becher, Bernd, and Hilla Becher. Bernd and Hilla Becher: Framework Houses of the Siegen Industrial Region. München: Schirmer/Mosel, 1977.