Brown, James I.
D.C. Heath, 1987
Buku Teks
James Taylor... [et al.]
Macmillan, 1993
Buku Teks
Whitten, Mary E.
Harcourt, 1966
Buku Teks SO
Folse, Keith S.
Binarupa Aksara Press , 1993
Buku Teks SO
Haarman, Louann
Oxford University Press, 1989
Buku Teks SO