ScienceDirect (Online service) & Hengstberger, F. (1989). Absolute radiometry: Electrically calibrated thermal detectors of optical radiation. Academic Press.
Chicago Style (17th ed.) CitationScienceDirect (Online service) and F. Hengstberger. Absolute Radiometry: Electrically Calibrated Thermal Detectors of Optical Radiation. Boston: Academic Press, 1989.
MLA (9th ed.) CitationScienceDirect (Online service) and F. Hengstberger. Absolute Radiometry: Electrically Calibrated Thermal Detectors of Optical Radiation. Academic Press, 1989.
Warning: These citations may not always be 100% accurate.