Schaefer, Richard T, author
McGraw-Hill, 2009
Buku Teks
M. Alwi Dahlan, author
Kadin Indonesia Komite Amerika Serikat(KIKAS), 1995
Buku Teks
Smith, Edward E., 1940-, author
[Publisher not identified], 2003
Buku Teks
Kalat, James W., author
Wadsorth , 2001
Buku Teks
Fernald, L. Dodge
Houghton Miffiln, 1978
Buku Teks