Barnett, Vic
Arnold , 2002
Buku Teks
Hansen, Morris H.
John Wiley & Sons, 1970
Buku Teks
Moser, Claus A.
Heinemann Educational Books, 1973
Buku Teks
Moser, Claus A.
Basic Books, 1972
Buku Teks
Moser, Claus A.
Heinemann Educational Books, 1974
Buku Teks