Justin Dillon, Meg Maguire, editor
McGraw-Hill, 2011
Buku Teks
Faludi, Andreas, author
Pergamon Press, 1978
Buku Teks
Janet Moyles, Jan Georgeson, and Jane Payler, editor
McGraw-Hill, 2011
Buku Teks
Ramsden, Paul
Routledge , 1992
Buku Teks
Montague, Earl J., author
Charles E. Merrill, 1987
Buku Teks