Moody, William Vaughn
Charles Scribner's Sons, 1943
Buku Teks
Evans, Ifor, Sir, author
Penguin Books, 1960
Buku Teks
Sampson, George, author
University Press, 1949
Buku Referensi
Sampson, George, author
University Press, 1959
Buku Teks
Otis, William Bradley, author
Barnes & Noble, [c1937]
Buku Teks