APA (7th ed.) Citation

Bartels, H., Umland, H., Krambeer, M., & Schäfer, V. Lubricating additives in rubber processing.

Chicago Style (17th ed.) Citation

Bartels, H., H. Umland, M. Krambeer, and V. Schäfer. Lubricating Additives in Rubber Processing.

MLA (9th ed.) Citation

Bartels, H., et al. Lubricating Additives in Rubber Processing.