John D. Cutnell [and others]
John Wiley & Sons, 2015
Buku Teks
Kitaigorodsky, A.
Foreign Language, [Date of publication not identified]
Buku Teks
Stevens, Malcolm P.
Oxford Univertity Press, 2009
Buku Teks
edited by F.A. Bovey and F.H. Winslow
Academic Press, 1979
Buku Teks
Klopffer, Walter
Springer, 1984
Buku Teks