Evans, James Robert, 1950-
Prentice-Hall, 1991
Buku Teks
Besterfield, Dale H.
Prentice-Hall, 1998
Buku Teks
Besterfield, Dale H.
Prentice-Hall, 1994
Buku Teks
Besterfield, Dale H.
Prentice-Hall, 1979
Buku Teks
Besterfield, Dale H.
Pearson Education, 2004
Buku Teks