Owen, Wilfred, author
Brookings Institution, 1966
Buku Teks
Mayer, John Robert, author
Massachusetts Harvard University Press , 1965
Buku Teks
Dickey, John W., author
McGraw-Hill, 1975
Buku Teks
Tata McGraw-Hill, 1980
Buku Teks
McGraw-Hill, 1983
Buku Teks