Judul Asli : Question & Answer Encyclopedia World History Catatan Indeks halaman : 38 - 40
Judul Asli : Questions & Answer Science & Techology Catatan Indeks hlm. : 38-40
Judul Asli : Questions & Answer Encylopedia Human Body Catatan Indeks hlm. : 38-40
catatan bibliografi hlm. : 77-84
catatan bibliografi hal : 59-60
catatan bibliografi halaman : 67 - 68
catatan bibliografi halaman : 82-83