Berg, L. (1967). Introduction to the operational calculus. North-Holland Pub. Co : J. Wiley.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Berg, Lothar. Introduction to the Operational Calculus. Amsterdam : New York: North-Holland Pub. Co : J. Wiley, 1967.
MLA -ийн эшлэл (9 дэх хэвлэлт)Berg, Lothar. Introduction to the Operational Calculus. North-Holland Pub. Co : J. Wiley, 1967.