Binder, Frederick M., author
D.C. Heath, 1988
Buku Teks
Bukowski, Douglas, author
Bedford/St. Martin's, 1999
Buku Teks
edited by Joseph Reither
McGraw-Hill, 1973
Buku Teks
Connell, R.W.
Longman Chesire, 1980
Buku Teks
Green, H. M., author
Angus & Robertson , 1984
Buku Teks