by the editors of Fortune
Doubleday, 1956
Buku Teks
Uris, Auren, author
McGraw-Hill , 1957
Buku Teks
Jennings, Eugene E., author
Harper & Row, 1962
Buku Teks
Levinson, Harry, author
Harvard University Press, 1971
Buku Teks
Burger, Chester, author
Macmillan, 1964
Buku Teks