Berg, L. (1967). Introduction to the operational calculus. North-Holland Pub. Co : J. Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBerg, Lothar. Introduction to the Operational Calculus. Amsterdam : New York: North-Holland Pub. Co : J. Wiley, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBerg, Lothar. Introduction to the Operational Calculus. North-Holland Pub. Co : J. Wiley, 1967.