Snow, Edgar, author
Random House , 1962.
Buku Teks
Basel : Verlag fur Recht und Gesellschaft A.G.
Majalah, Jurnal, Buletin
Sprenkel, Otto B. Van Der
Turnstile Press, 1950
Buku Teks
Watson, William, author
Max Parrish, 1960
Buku Teks
Roberts, J. A. G. (John Anthony George), 1935-, author
Palgrave Macmillan, 2011
Buku Teks