Cita APA (7a ed.)

Hougen, O. A., Watson, K. M., & Ragatz, R. A. Chemical process principles. Wiley.

Cita Chicago Style (17a ed.)

Hougen, Olaf A., Kenneth M. Watson, y Roland A. Ragatz. Chemical Process Principles. s.l.: Wiley.

Cita MLA (8a ed.)

Hougen, Olaf A., et al. Chemical Process Principles. Wiley.