Whitmire, Richard
Why boys fail : saving our sons from an educational system taht's leaving them behind
Amacom, 2010
Buku Teks
Armstrong, Kenneth A.
Brexit time = Leaving the EU - Why, How and When?
Cambridge University Press, 2017
eBooks
Voight, Cynthia
Sons from afar
Aladdin Paperbacks, 1987
Buku Teks SO
Why outsourcing is our friend
Artikel Jurnal
Hodgson, Godfrey
America in our time : from world war II to nixon what happened and why
Vintage Books, 1976
Buku Teks SO