Davies, Paul
Simon & Scuster , 1995
Buku Teks
Blalock, Hubert M., author
McGraw-Hill, 1960
Buku Teks
Moser, Claus A., author
Heinemann Educational Books, 1973
Buku Teks
Moser, Claus A., author
Basic Books, 1972
Buku Teks
Moser, Claus A., author
Heinemann Educational Books, 1974
Buku Teks