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