by R.D. Thompson ... [et al.]
Longman, 1993
Buku Teks
Van Riper, Joseph E., author
McGraw-Hill, 1971
Buku Teks
Knapp, Brian, author
Longman House, 1992
Buku Teks
Muller, Robert A., author
Random House, 1978
Buku Teks
Craghan, Michael, author
John Wiley & Sons, 2003
Buku Teks