Gaya APA

BARKER, J, A. (1993). PARADIGMS THE BUSINESS OF DISCOVERING THE FUTURE . Jakarta: HEARPERBUSINESS A DIVICION OF HEARPERCOLLINS PUBLISHERS.

Gaya MLA

BARKER, JOEL, ARTHUR. "PARADIGMS THE BUSINESS OF DISCOVERING THE FUTURE". Jakarta: HEARPERBUSINESS A DIVICION OF HEARPERCOLLINS PUBLISHERS, 1993. Ekonomi.