Phillips, G.D.R.
Frederick Muller, 1942
Buku Teks
Friters, Gerard M.
The Johns Hopkins Press, 1949
Buku Teks
Cammann, Schuyler
The Ronald Pres Company, 1951
Buku Teks
Bell, H. T. Montague
George Routledge & Sons, 1919
Buku Teks
Dunn, Edward
[t.p.], , 1935.
Buku Teks