Gaya APA

Hougen, O, A., Watson, K, M. (1976). Chemical process principles part I. material and energy balances. (1976). : New York : John Wiley & Sons, Inc.,.

Gaya MLA

Hougen, Olaf, A.., Watson, Kenneth, M.. "Chemical process principles part I. material and energy balances.". 1976 : New York : John Wiley & Sons, Inc.,, 1976. Text.