Bennett, Olivia, author
Palgrave Macmillan, 2012
Buku Teks
Kreutzmann, Hermann, editor
Springer, 2012
eBooks
Crandell, Thomas L.
McGraw-Hill, Higher Education, 2009
Buku Teks
Zanden, James W. Vander, author
McGraw-Hill, 1993
Buku Teks
Papalia, Diane E., author
McGraw-Hill, 1992
Buku Teks