Hall, Kermit L., author
Oxford University Press, 1989
Buku Teks
Gilmore, Grant
Yale University Press, 1977
Buku Teks
Kempin, Frederick G
West Publishing Co, 1973
Buku Teks
Schwartz, Bernard, author
McGraw-Hill, 1974
Buku Teks
Massachusetts, 1968
Buku Teks