Dye, Thomas R., author
Prentice_Hall, Inc, 1988
Buku Teks
Holloway, William Vernon, author
McGraw-Hill , 1951
Buku Teks
Adrian, Charles R., author
McGraw-Hill , 1978
Buku Teks
Addison-wesley, 1982
Buku Teks
Agger, Robert E.
N.Y. John-Wiley , 1966
Buku Teks