Bill, H.(2004).Speed mathematics : Secret skill for quick calculation / Bill Handley, John Wiley, Sons (Ed. Bahasa Indonesia, Cet. I).:Pakar Raya.
Gaya MLA
Handley, Bill."Speed mathematics : Secret skill for quick calculation / Bill Handley, John Wiley, Sons".Ed. Bahasa Indonesia, Cet. I:Pakar Raya,2004.Textbook.