Knapp, Brian, author
Longman House, 1992
Buku Teks
Knapp, Brian J., author
Longman, 1992
Buku Teks
Knapp, Brian, author
Longman House, 1992
Buku Teks
edited by Jonathan Rigg
Archipelago Press, 1996
Buku Teks
Treshow, Michael, author
McGraw-Hill, 1976
Buku Teks