McIntosh, Jane
The practical archaelogist: how we know what we know about the past
Checkmark Books, 1999
Buku Referensi
Cochrane, Susan H.
Fertility and education: what do we really know?
Johns Hopkins University Press, 1979
Buku Teks
Rabe, Cynthia Barton
The innovation killer: how what we know limits what we can imagine-- and what smart companies are doing about it
American Management Association, 2006
eBooks
Harry Siswanto
What we must know about communism / by Harry and Bonaro Overstreet
Norton, 1958
Buku Teks
What do products/services cost how do we know?
Artikel Jurnal