Saya mau tau Rujukan dari Gula serbuk. Jelaskan dalam bahasa melayu

Asadi, Mosen. Beet-Sugar Handbook. John Wiley & Sons, 2006.

Chen, James C. P., Chung Chi Chou. Cane Sugar Handbook: A Manual for Cane Sugar Manufacturers and Their Chemists. John Wiley & Sons, 1993.