McCloskey, Donald N., author
Macmillan, 1982
Buku Teks
Little, Ian M.D.
At the Clarendon Press , 1953
Buku Teks
Barth, Alan
The Viking Press, 1961
Buku Teks
Price, Willard
The John Day Company, 1954
Buku Teks
Agar, Herbert
Hougton Mifflin Company, 1950
Buku Teks