Row, Peterson, 1962
Koleksi Publik
Goddard, Harold C., author
Phienix Books, 1990
Buku Teks
Smith, William Jay
Wesleyan University Press, 1961
Buku Teks
Parrott, Thomas Marc, author
Charles Scribner's Sons, 1955
Buku Teks
Paley, Marton D.
Oxford at The Clarendon Press , 1970
Buku Teks