Berpikir di luar kotak: Perbedaan antara revisi
Konten dihapus Konten ditambahkan
Baris 18:
* [http://www.daviddarling.info/encyclopedia/D/Dudeney.html Dudeney, Henry Ernest (1857-1930)]
* [http://www-history.mcs.st-and.ac.uk/Biographies/Dudeney.html Henry Ernest Dudeney]
* [http://www.edwarddebono.com/
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