Prentiss, Stan
Prentice-Hall, 1979
Buku Teks
Lenk, John D.
McGraw-Hill, 1991
Buku Teks
Cashmore, Ellis
Routledge, 1994
Buku Teks
Pease, Robert A.
Newnes, 1993
Buku Teks
Middleton, Robert Gordon, 1908-
Bombay: D.B. Taraporevala Sons & Private, 1972
Buku Teks