Quentin Skinner, editor; Bo Strath, editor
Cambridge University Press, 2003
Buku Teks
Cambridge University Press, 2017
eBooks
Baumol, William J., author
Mass. Harvard University Press, 1952
Buku Teks
Paris : The United Nations Educational
Majalah, Jurnal, Buletin
Mowbray, Albert H., author
McGraw-Hill, c1969
Buku Teks