Weilacher, Udo, author
Birkhauser, 1999
Buku Teks
Lewis, Barry, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Blair, Sheila
Yale University Press, 1994
Buku Teks
edited by Mari Pritchard Parker, Elvio Angeloni
McGraw-Hill, 2013
Buku Teks
Yeomans, Richard, author
Garnet, 2006
Buku Teks