Woll, Peter, author
Little, Brown, 1984
Buku Teks
Woll, Peter, author
Longman , 2001
Buku Teks
Woll, Peter, author
Little, Brown, 1965
Buku Teks
Bittker, Boris I., author
Stanford University Press, 1960
Buku Teks
by Stanley S. Survey ... [and others]
Foundation Press, 1972
Buku Teks