Knight, Frank Hyneman
The ethics of competition and other essays / by Frank Hyneman Knight
Augustus M. Kelley, 1951
 Buku Klasik
Sharp, Frank Chapman
Business Ethics; studies in fair competition / Frank Chapman Sharp, Philip G. Fox
Appleton-Century-Croft , 1937
 Buku Teks
Knight, Frank H.
Intelligence and democratic action/ Frank H. Knight
Mass. Harvard University Press , 1960
 Buku Teks
Mill, J.S.
Utilitarianism and other essays
Penguin Books, 1987
 Buku Teks
Santayana, George
The birth of reason and other essays
Columbia University Press, 1995
 Buku Teks