Churchill, Ruel V., 1899-1987, author
McGraw-Hill, 1972
Buku Teks
Carslaw, H.S.
Oxford University Press, 1948
Buku Teks
Williamson, Richard E.
Prentice-Hall, 1979
Buku Teks
Cox, Arthur F., author
Harcourt Brace Javanovich, 1978
Buku Teks
Stewart, James, 1941-, author
Brooks, 1998
Buku Teks