Bell, Mary Hayley, author
What shall we do tomorrow? the story of my families
J.B. Lippincott, 1968
 Buku Teks
Duhigg, Charles, author
The power of habit: why we do what we do, and how to change
Heinemann, 2012
 Buku Teks
Cochrane, Susan H., author
Fertility and education: what do we really know?
Johns Hopkins University Press, 1979
 Buku Teks
Sexton, John, author
How free are we? : what the constitution says we can and cannot do
M. Evans and Company, 1986
 Buku Teks
What do products/services cost how do we know?
 Artikel Jurnal
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