Oslo University Press, 1958
Buku Teks
Smedley, Agnes, author
Vanguard Press, 1938
Buku Teks
Adams, Henry
Houghton Miffiln, 1918
Buku Teks
Lawson, Henry, 1867-1922, author
John Ferguson, 1979
Buku Teks
Drinker, Henry S.
Columbia University Press, 1965
Buku Teks