edited by John R. Baldwin [and others]
Lawrence Erlbaum Associates, 2006
Buku Teks
Dobrovie-Sorin, Carmen
Springer, 2012
eBooks
Hewson, Lance
Routledge , 1991
Buku Teks
Zlatova, Y., author
Foreign Languages Publishing House , 1959
Buku Teks
Mitchell, C. Thomas, author
Van Nostrand Reinhold, 1993
Buku Teks