edited by John Sears and Pete Sorensen
Routledge Falmer, 2000
Buku Teks
Carin, Arthur A.
Charles E. Merrill, 1964
Buku Teks
Woodburn, John H.
Macmillan, 1965
Buku Teks
Carin, Arthur A.
Charles E. Merrill, 1985
Buku Teks
Renner, John W.
Harper & Row, 1968
Buku Teks