Library of Conggress, 1987
Buku Teks
Library of Congress , 1986
Buku Teks
Library of Congress; edited by James W. Mc. Chung
Library of Congress, 1991
Buku Teks
Library of Congress
Library of Congress , 1996
Buku Teks
Library of Conggress 1988, 1988
Buku Teks