Brennan, Niall, 1918-2005, author
Hill of Content, 1971
Buku Teks
Frank, Philipp
alfred A. Knopf, 1947
Buku Teks
Nicolson, Harold, author
Constable, 1945
Buku Teks
Holt, Sverre, author
Commercial press, limited, 1935
Buku Teks
Ackerman, Robert
Cambridge University Press , 1990
Buku Teks