Skaife, Linda
National Textbook Company, 1994
Buku Teks
Duhamel, Georges
J. M. Dent and Sons Ltd., 1952
Buku Teks
Rybak, Stephanie
Macmillan and Co., 1985
Buku Teks
Weston, Burns H.
Syracuse University Press, 1971
Buku Teks
Whitmarsh, W. F. H.
Longmans, Green and Co., 1960
Buku Teks