(1977). Hilla and Bernd Becher: Preparation plants. Aperture.
Cita Chicago (17th ed.)"Hilla and Bernd Becher: Preparation Plants." Aperture 1977.
Cita MLA (8th ed.)"Hilla and Bernd Becher: Preparation Plants." Aperture, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.