Cita APA

Baumler, E., & Baumler, E. (1968). A Century of chemistry. Frankfurt: Dusseldorf.

Citación estilo Chicago

Baumler, Ernst, y Ernst Baumler. A Century of Chemistry. Frankfurt: Dusseldorf, 1968.

Cita MLA

Baumler, Ernst, y Ernst Baumler. A Century of Chemistry. Frankfurt: Dusseldorf, 1968.