Gates, Frank C.
McGraw-Hill , 1949
Buku Teks
edited by Douglas G. Chapman
International Co-operation Publishing House, 1981
Buku Teks
Goodwin, T.W., author
Pergamon Press, 1983
Buku Teks
Eames, Arthur J., author
McGraw-Hill , 1953
Buku Teks
Curtis, Otis F., author
Mc-Graw-Hill, 1950
Buku Teks