Brostoff, Jonatham, author
Hayfever the complete guide
Bloomsbury pubishing Limited, 1993
 Buku Teks
Guide To Natural Healing
Geddes & Grsset, 1997
 Buku Teks
Douglas-Young, John, author
Technician?s guide to microelectronics
Parker Publishing Company, 1978
 Buku Referensi
Church, James C., author
Practical plumbing design guide
McGraw-Hill, 1979
 Buku Referensi
Peters, Pamela, author
Biotechnology: a guide to genetic engineering
Wm.C. Brown Pub., 1993
 Buku Referensi