edited by Brian Head
Oxford University Press, 1988
Buku Teks
Stephen Johnston... [et al.]
Harper Educational, 1995
Buku Teks
edited by S. Encel ... [et.al.]
Longman Cheshire, 1984
Buku Teks
Crisp, L.F. (Leslie Finlay)
Longman Chesire, 1965
Buku Teks
Lucy, Richard
Macmillan, 1985
Buku Teks