APA

Leitz (Ernst) GmbH, . (1929). The microscope and its application. [s.l: s.n.].

Chicago

Leitz (Ernst) GmbH, . 1929. The microscope and its application. [s.l: s.n.].

Harvard

Leitz (Ernst) GmbH, . (1929). The microscope and its application. [s.l: s.n.].

MLA

Leitz (Ernst) GmbH, . The microscope and its application. [s.l: s.n.]. 1929.