Cita APA (7th ed.)

BARKER JOEL ARTHUR. (1993). PARADIGMS: THE BUSINESS OF DISCOVERING THE FUTURE. HARPER COLLINS PUBLISHERS.

Cita Chicago (17th ed.)

BARKER JOEL ARTHUR. PARADIGMS: THE BUSINESS OF DISCOVERING THE FUTURE. NEW YPRK: HARPER COLLINS PUBLISHERS, 1993.

Cita MLA (9th ed.)

BARKER JOEL ARTHUR. PARADIGMS: THE BUSINESS OF DISCOVERING THE FUTURE. HARPER COLLINS PUBLISHERS, 1993.