Coppock, Joseph D.
McGraw-Hill, 1959
Buku Teks
Klingenberg, Joseph J.
Reinhold Publishing & Co., 1965
Buku Teks
Corson, John J., author
McGraw-Hill , 1963
Buku Teks
Seneca, Joseph
Prentice-Hall, 1979
Buku Teks
Taylor, George A., author
D. Van Nostrand, 1964
Buku Teks