Radlauer, Ruth, author
Bowmar, 1971
Buku Teks
Radlauer, Ruth, author
Bowmar, 1971
Buku Teks
International Reading Association / editor by Robert Schreiner, 1979
Buku Teks
Longmans, 1966/1967
Buku Teks
Baker, Colin, author
Multilingual Matters Ltd., 1995
Buku Referensi