Baggini, Julian, author
Palgrave Macmillan, 2012
Buku Teks
edited by Nicholas Bunnin and E. P. Tsui-James
Wiley, 2003
Buku Teks
Christian, James L. , author
Wadsworth and Cengage Learning, 2012
Buku Teks
Horner, Chris, author
Cambridge, 2004
Buku Teks
Foreign Languages Publishing House, 1892
Buku Teks