Austin, Richard L. ; Dawson, Kerry ; Musiak, Thomas A. ; Scerbo, William, edited
Van Nostrand Reinhold Company, 1985
Buku Referensi
Weilacher, Udo, author
Birkhauser, 1999
Buku Teks
Weilacher, Udo, author
Birkhauser, 1999
Buku Teks
Berrizbeitia, Anita, author
Rockport, 1999
Buku Teks
Alofsin, Anthony
W.W. Norton & Company, 2002
Buku Teks