Callahan, Michael T.
McGraw-Hill , 1992
Buku Teks
Callahan, Michael T.
McGraw-Hill, 1992.
Buku Teks
Patrick, Charles, author
Pearson/Prentice Hall, 2004
Buku Teks
Mubarak, Saleh, author
Pearson-Prentice Hall, 2005
Buku Teks
Callahan, Daniel
Collier-Macmillan Ltd., 1970
Buku Teks