Davis, Thomas W., author
Reston Pub., 1981
Buku Teks
Leventhal, Lance A., author
Prentice-Hall, 1982
Buku Teks
Leventhal, Lance A., author
Prentice-Hall, 1981
Buku Teks
Leventhal, Lance A., author
Prentice-Hall, 1987
Buku Teks
Levine, Morris E.
Prentice-Hall, 1982
Buku Teks