by George G. Bogert ... [and others]
Foundation Press, 2012
Buku Teks
Penner, J. E. (James E.)
Oxford University Press, 2016
Buku Teks
by Paul A. Freund [and others]
Little, Brown, 1966
Buku Teks
Scott, Austin Wakeman, 1884-1981
Little, Brown, 1963
Buku Teks
Todd, Paul
London : Balckstone, 1994,
Buku Referensi