edited by Rudolf Schlesinger
Foundation Press, 1959
Buku Teks
Le Sueur, A.P. (Andrew P.), author
Oxford University Press, 2013
Buku Teks
Penner, J. E. (James E.), author
Oxford University Press, 2016
Buku Teks
Scott, Austin Wakeman, 1884-1981, author
Little, Brown, 1963
Buku Teks
Todd, Paul, author
London : Balckstone, 1994,
Buku Referensi