America
New York: W.W.Norton & Company, 1988,
 Buku Referensi
Sethi, S. Prakash
Up against the corporate wall: modern corporations and social issues of the seventies
Prentice-Hall, 1974
 Buku Teks
Douglas, William O.
America challenged
Princeton University Press , 1960
 Buku Teks
Douglas, William O.
America challenged
Princeton University Press, 1960
 Buku Teks
Harlow, Ralph Volney
Story of America
Holt, Rinehart and Winston,Inc, 1964
 Buku Teks