Huebner, Stefan, author
National University of Singapore (NUS Press), 2016
Buku Teks
Amerika : Prentice-hall, 1967
Buku Teks
Nevins, Allan, 1890-1971, author
Macmillan, 1927
Buku Teks
Niel, Robert Van, author
Foris Publications, 1960
Buku Teks
Lewis, Bernard, author
Oxford University Press, 1961
Buku Teks