Cambridge University Press, 2003
eBooks
Oates, John, author
Blackwell , 2004
Buku Teks
edited by Eric Amsel, James P. Byrnes
Lawrence Erlbaum Associates, 2002
Buku Teks
Cambridge University Press , 1986
Buku Teks
Erika Hoff, editor
Wiely-Blackwell, 2012
Buku Teks