APA (7th ed.) Citation

Arpe, H., Gerhartz, W., & Ullmann, F. (1990). Ullmann's encyclopedia of industrial chemistry editors, Hans-Jürgen Arpe, Wolfgang Gerhartz (5th completely rev. ed.). VCH.

Chicago Style (17th ed.) Citation

Arpe, Hans-Jürgen, Wolfgang Gerhartz, and Fritz Ullmann. Ullmann's Encyclopedia of Industrial Chemistry Editors, Hans-Jürgen Arpe, Wolfgang Gerhartz. 5th completely rev. ed. VCH, 1990.

MLA (9th ed.) Citation

Arpe, Hans-Jürgen, et al. Ullmann's Encyclopedia of Industrial Chemistry Editors, Hans-Jürgen Arpe, Wolfgang Gerhartz. 5th completely rev. ed. VCH, 1990.

Warning: These citations may not always be 100% accurate.