Schmuck, Richard A., author
Skylight, 1998
Buku Teks
Skilight Propessional Dev, 2000
Buku Teks
Norton, Lin S., author
Routledge, 2009
Buku Teks
Craig, Dorothy Valcarcel, author
Jossey-Bass, 2009
Buku Teks
Wiersma, William, author
Pearson, 2009
Buku Teks