Webber, N.B.
:Chapman and Hall, 1978
Buku Teks
Khanna, Prem Nath, author
Engineers? Publishers & Advertisers, 1981
Buku Referensi
Murray, Jerome T., author
McGraw-Hill, 1973
Buku Teks
Murray, Jerome T., author
McGraw-Hill, 1973
Buku Teks
Seelye, Elwyn E.
John Wiley & Sons, 1951
Buku Teks