Royer, King
John Wiley & Sons, 1970
Buku Teks
McCormac, Jack C., author
Prentice-Hall, 1995
Buku Teks
Evett, Jack B., 1942-, author
Prentice-Hall, 1991
Buku Teks
McCormac, Jack C., author
Prentice-Hall, 1983
Buku Teks
Anderson, James M., author
McGraw-Hill , 1985
Buku Teks