Knight, Ronald A.
Dickenson Pub. , 1969
Buku Teks
Combellack, Wilfred J.
John Wiley & Sons, 1962
Buku Teks
Youse, Bevan K., author
Dickenson Pub, 1966
Buku Teks
Kaplan, Wilfred, author
Addison-Wesley, 1966
Buku Teks
Heckenbach, Alan J., author
Macmillan, 1970
Buku Teks