APA (7th ed.) Citation

Baumler, E., Ehrhart, G., & Muthesius, V. (1968). A century of chemistry. Econ.

Chicago Style (17th ed.) Citation

Baumler, Ernst, Gustav Ehrhart, and Volkmar Muthesius. A Century of Chemistry. Dusseldorf: Econ, 1968.

MLA (9th ed.) Citation

Baumler, Ernst, et al. A Century of Chemistry. Econ, 1968.