Walker, Nathan, author
McGraw-Hill, 1979
Buku Teks
Watkins, Michael, author
Jossey-Bass, 2002
Buku Teks
Poe, Roy W., author
McGraw-Hill, 1994
Buku Referensi
Poe, Roy W., author
McGraw-Hill, 2006
Buku Teks
Poe, Roy W., author
McGraw-Hill, 1988
Buku Teks