by Les Rowntree ... [and others]
Prenticel Hall, 2008
Buku Teks
James, Preston E.
John Wiley & Sons, 1980
Buku Teks
Kolevzon, Edward R.
Allyn and Bacon, 1959
Buku Teks
Israel, Saul
Holt, Rinehart and Winston, 1976
Buku Teks
James, Preston E.
Macmillan, 1972
Buku Teks