Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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