Cita APA (7th ed.)
Hougen, O. A. (1936). Industrial Chemical Calculations. Wiley.
Cita Chicago (17th ed.)
Hougen, Olaf A. Industrial Chemical Calculations. Nueva York, EUA: Wiley, 1936.
Cita MLA (9th ed.)
Hougen, Olaf A. Industrial Chemical Calculations. Wiley, 1936.
Atenció: Aquestes cites poden no estar 100% correctes.