Cita APA (7th ed.)

Gerhartz, W. (1985). Ullmann's encyclopedia of industrial chemistry (5a. ed.). VCH.

Cita Chicago (17th ed.)

Gerhartz, Wolfgang. Ullmann's Encyclopedia of Industrial Chemistry. 5a. ed. Weinheim: VCH, 1985.

Cita MLA (9th ed.)

Gerhartz, Wolfgang. Ullmann's Encyclopedia of Industrial Chemistry. 5a. ed. VCH, 1985.