Παραπομπή APA

Hougen , O. A., Watson , K. M., & Ragatz , R. A. (1959). Chemical process principles: Part I - Material and energy balances. Asia publishing house.

Παραπομπή Chicago Style

Hougen , Olaf A., Kenneth M. Watson , και Roland A. Ragatz. Chemical Process Principles: Part I - Material and Energy Balances. New York: Asia publishing house, 1959.

Παραπομπή MLA

Hougen , Olaf A., et al. Chemical Process Principles: Part I - Material and Energy Balances. Asia publishing house, 1959.