Heck, R. M., Farrauto, R. J., & Gulati, S. T. (2009). Catalytic air pollution control: Commercial technology (3rd ed.). John Wiley.

Heck, Ronald M., Robert J. Farrauto, and Suresh T. Gulati. Catalytic Air Pollution Control: Commercial Technology. 3rd ed. Hoboken, N.J.: John Wiley, 2009.

Heck, Ronald M., et al. Catalytic Air Pollution Control: Commercial Technology. 3rd ed. John Wiley, 2009.