Purpura, James E
Assessing Grammar
Cambridge University Press, 2004
 eBooks
Read, John
Assessing vocabulary
Cambridge University Press, 2000
 Buku Teks
Weigle, Sara Chusing
Assessing writing
Cambridge University Press, 2002
 Buku Teks
Purpura, James E.
Assessing grammar
Cambridge University Press, 2005
 Buku Teks SO
Luoma, Sari
Assessing speaking
Cambridge University Press, 2007
 Buku Teks SO