Reagan, Michael D.
Oxford University Press, 1963
Buku Teks
Andrerson, James E.
Addison-Wesley, 1970
Buku Teks SO
Schiller, Bradley R.
Prentica-Hall , 1975
Buku Teks
Hansen, Alvin Harvey, 1887-1975
MacGraw-Hill , 1947
Buku Teks SO
Steiner, George Albert, 1912-
McGraw-Hill, 1953
Buku Teks