Bradley, Michael, author
Scott, Foresman, 1985
Buku Teks
Bronfenbrenner, Martin, author
Houghton Mifflin, 1987
Buku Teks
Dornbusch, Rudiger, author
McGraw-Hill, 1981
Buku Teks
Romer, David, author
McGraw-Hill , 1996
Buku Teks
Fischer, Stanley, author
McGraw-Hill, 1988
Buku Teks