Papalia, Diane E., author
McGraw-Hill, 2002
Buku Teks
Papalia, Diane E., author
Academic Internet Publishers, 2007
Buku Teks
McGraw-Hill, 1993
Buku Teks
Papalia, Diane E., author
McGraw-HIll , 2006
Buku Teks
Santrock, John W., author
University of Texas, 1990
Buku Teks