Newmeyer, Sarah, author
New American Library , 1955
Buku Teks
Todorow, Maria Foesi, author
Fratelli Fabbri , 1970
Buku Referensi
Harper, J. Russell.
University of Toronto Press , 1966
Buku Teks
Watson - Guptill Pub. , 2000
Buku Teks
Jang, Se-Hyeon, author
Gain, 2008
Buku Teks