Loewenberg, Frank M.
F E Peacock, 1972
Buku Teks
Anderson, David
Macmillan, 1982
Buku Teks
Loewenberg, Frank
F.E. Peacock Publishers, Inc, 1988
Buku Teks
Sunit Agus Tri Cahyono, author
Departemen Sosial, 2004
Buku Teks
Klenk, Robert W.
Wadsworth, 1974
Buku Teks