Postlethwait, John H., author
Brooks/Cole, Thomson Learning, 2003
Buku Teks
Muzos, Steven J.
Harper Collins College, 1992
Buku Teks
Weisz, Paul B., author
McGraw-Hill, 1963
Buku Teks
Weisz, Paul B., author
McGraw-Hill, 1982
Buku Teks
Keeton, William T., author
W.W. Norton, 1967
Buku Teks