Tonne, Herbert Arthur, author
McGraw-Hill, 1963
Buku Teks
Jackson, John H., author
Prentice-Hall, 1992
Buku Teks
Crabbe, Ernest H., author
South-Western Publishing, 1951
Buku Teks
Crabbe, Ernest H., author
South-Western Publishing, 1961
Buku Teks
McGuire, Joseph W., author
Prentice-Hall, 1964
Buku Teks