Wills, G. (1972). Technological Forecasting: The Art and Its Managerial Implications. Penguin: Pelican Library of buiness and management.
استشهاد بنمط شيكاغوWills, Gordon. Technological Forecasting: The Art and Its Managerial Implications. Penguin: Pelican Library of buiness and management, 1972.
MLA استشهادWills, Gordon. Technological Forecasting: The Art and Its Managerial Implications. Penguin: Pelican Library of buiness and management, 1972.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.