taoka, George M.
harpel Collins Publishers, 1991
Buku Teks
Daniels, John D., author
Addison-Wesley, 1994
Buku Teks
Daniels, John D., author
Addison-Wesley, 1982
Buku Teks
Kline, John M., author
Quorum Books, 1985
Buku Teks
Daniels, John D.
Addison-Wesley , 1986
Buku Teks