Parkes, James
Penguin Book, 1946
Buku Teks
Garrett, Mitchell B.
Appleton-Century-Crofts, , 1947
Buku Teks
Rosenkilde and Bagger , 1963
Buku Teks
Dawson, Christopher
Sheed and Ward, 1946
Buku Teks
Davis, H. W. C.
Oxford University Press, 1960
Buku Teks