Lipsey, Richard G., author
Pearson, 2008
Buku Teks
Harvey, Jack, 1917-, author
Macmillan, 1973
Buku Teks
Clark, James E., author
Houghton Mifflin, 2002
Buku Teks
Rowan, D.C., author
Macmillan, 1968
Buku Teks
Rowan, D.C., author
Macmillan, 1978
Buku Teks