Fred Genesee, Kathryn Lindholm-Leary, William M. Saunders, Donna Christian
Cambridge University Press, 2008
Buku Teks
edited by Fred Genesee ...[et al.]
Cambridge University Press, 2006
Buku Teks
Burns, Nancy, author
Mosby , 2009
Buku Teks
edited by James Flood, Julie M. Jensen, Diane Lapp, James R. Squire
Macmillan, 1991
Buku Referensi
McDonough, Jo
Arnold, 1997
Buku Teks