Richards, Jill, authour
George Allen and Unwin, 1979
Buku Teks
Abd. Ghofur
Perpustakaan STAIN Pamekasan Press, 2008
Buku Teks
Morgan, John, 1944-2004, author
Cambridge University Press, 1983
Buku Teks
Cambridge University Press, 1990
Buku Teks
Allen, Edward David, author
Harcourt Brace Jovanovich, [Date of publication not identified]
Buku Teks