Constant, B. (1985). Process instruments and controls handbook (3a. ed.). McGraw-Hill.
Cita Chicago (17th ed.)Constant, Benjamin. Process Instruments and Controls Handbook. 3a. ed. Nueva York: McGraw-Hill, 1985.
Cita MLA (9th ed.)Constant, Benjamin. Process Instruments and Controls Handbook. 3a. ed. McGraw-Hill, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.