APA ציטוט

Ehrhart, G. (1968). A century of chemistry. Dusseldorf: Econverlag.

Trích dẫn kiểu Chicago

Ehrhart, Gustav. A Century of Chemistry. Dusseldorf: Econverlag, 1968.

ציטוט MLA

Ehrhart, Gustav. A Century of Chemistry. Dusseldorf: Econverlag, 1968.