Scratch pemrograman visual untuk semuanya
 Artikel Jurnal
Berle, Adolf A., Jr.
If Marx were to return
U.S. Information Service, 1965
 Buku Teks
Ritchie, John C.
Australia as once we were
William Heinemann, 1975
 Buku Teks
Pulvers, Roger
If there were no Japan : a cultural memoir
Publishing Industry Foundation for Culture, 2015
 Buku Teks
Hodges, Peter
How the pyramids were built
Aris & Phillips, 1993
 Buku Referensi