Apter, T.E.
Why women don't have wives: professional success and motherhood/Terri Apter
Basingstoke, Hampshire Macmillan 1985,
 Buku Teks SO
Rubinstein, William D.
The myth of rescue : why the democracies could not have saved more Jews from the Nazis / William D. Rubinstein
Routledge, 1997
 Buku Teks SO
Rossi, Peter H.
Why families move
Sage Publications, 1980
 Buku Teks SO
Hart, B.H. Liddell
Why don't we learn from history?
George Allen and Unwin, 1946
 Buku Teks SO
Sinek, Simon
Leaders eat last: why some teams pull together and others don't
Penguin, 2017
 Buku Teks