Post, Gordon C.
The Liberal Arts Press, 1957
Buku Teks
Keir, D. L. (David Lindsay), author
Oxford University Press, 1948
Buku Teks
Keir, D. L. (David Lindsay), author
Oxford, 1959
Buku Teks
Marston, John
Pitman, 1993
Buku Teks
Dine, Janet, author
Blackstone Press, 1993
Buku Teks