Behrman, Carol H., author
Applied Research in Education, 2000
Buku Teks
Langan, John, 1942-, author
McGraw-Hill , 2001
Multimedia
Langan, John, 1942-, author
MCGraw-Hill, 2001
Multimedia
Langan, John, 1942-, author
McGraw-Hill, 2001
Buku Teks
Joyce, Helen de Silva, author
Phoenix Education, 2000
Buku Teks