Gobran, Alfonse
Prindle, Weber & Schmidt, 1975
Buku Teks
Miller, Julie
McGraw-Hill, Higher Education, 2008
Buku Teks
Gaughan, Edward
Brooks/Cole, 1970
Buku Teks
Rees, Paul K.
McGraw-Hill , 1971
Buku Teks
Mueller, Francis J.
Prentice-Hall, 1979
Buku Teks