Ebb, Lawrence F.
West Publishing Company, 1964
Buku Teks
Ebb, Lawrence F., author
West Publishing, 1964
Buku Teks
Kolde, Endel J.
Prentice-Hall, 1968
Buku Teks
Boatright, John R., author
Pearson education International, 2009
Buku Teks
Appleton-Century-Crofts , 1967
Buku Teks