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Gaya APA
Drucker, P, F.(1985).Inovasi Dan Kewiraswastaan : Praktek Dan Dasar-Dasar .:Erlangga.
Gaya MLA
Drucker, Peter, F.."Inovasi Dan Kewiraswastaan : Praktek Dan Dasar-Dasar".:Erlangga,1985.Text.