Gesell, Arnold
Harper & Row, 1949
Buku Teks
Zanden, James W. Vander
McGraw-Hill, 1993
Buku Teks
Craig, Garce J.
Prentice-Hall, 1992
Buku Teks
Crandell, Thomas L.
McGraw-Hill, Higher Education, 2009
Buku Teks
Papalia, Diane E.
McGraw-Hill, 1992
Buku Teks