Goodyear, , 1974"
Buku Teks
Dorsett, Joseph L.
Allyin and Bacon, 1972
Buku Teks
Nunz, Gregory J., author
McGraw-Hill, 1967
Buku Teks
Larson, Ron, 1941-, author
Brooks/Cole Cengage Learning, 2012
Buku Teks
Sharp, Henry, author
Prentice-Hall, 1961
Buku Teks