Scheid, Francis, author
McGraw-Hill, 1983
Buku Teks
Linz, Peter, author
John Wiley & Sons, 1979
Buku Teks
Scheid, Francis, author
McGraw-Hill, 1988
Buku Teks
Scheid, Francis, author
Erlangga, 1988
Buku Teks
Research abd Education Association, 1997
Buku Teks