edited by John Sears and Pete Sorensen
Routledge Falmer, 2000
Buku Teks
Richards, Jack C., author
Cambridge University Press, 2015
Buku Teks
Carin, Arthur A., author
Charles E. Merrill, 1964
Buku Teks
Carin, Arthur A., author
Charles E. Merrill, 1985
Buku Teks
Woodburn, John H., author
Macmillan, 1965
Buku Teks