Traister, John E.
Reston Publishing , 1979
Buku Teks
Snow, Charles W.
Prentice-Hall, 1976
Buku Teks
Bethune, James D.
Prentice-Hall, 1980
Buku Teks
Dickerson, Reed
Little, Brown and Company, 1954
Buku Teks
Hepler, Donald E.
McGraw-Hill , 1977
Buku Teks