Berry, T. (2010). Sales and Market Forecasting for Entrepreneurs. Business Expert Press.
استشهاد بنمط شيكاغوBerry, Tim. Sales and Market Forecasting for Entrepreneurs. Business Expert Press, 2010.
MLA استشهادBerry, Tim. Sales and Market Forecasting for Entrepreneurs. Business Expert Press, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.