Cabeza, Roberto, author
Oxford University Press, 2016
eBooks
Bergman, Moe
"Baltimore: University Park Press, 1980",
Buku Teks
Papalia, Diane E., author
Boston, 2007
Buku Teks
Santrock, John W., author
Wm. C. Brown Publishers, 1985
Buku Teks
Koncelik, Joseph A., author
Hutchinson Ross, 1982
Buku Teks