Hart, David J.
Penerbit Erlangga, 2003
Multimedia
Buchanan, Herbert E., author
Houghton Mifflin, 1928
Buku Teks
Borden, Robert S., author
North-Holland, 1983
Buku Teks
Adams, Roger, 1889-1971, author
McMillan, 1963
Buku Teks
Jurch, George R., author
Burgess, 1975
Buku Teks