Johnson, J. S. The curvilinear and conditional effects of product line breadth on salesperson performance, role stress, and job satisfaction. Journal of the academy of marketing science.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Johnson, Jeff S. "The Curvilinear and Conditional Effects of Product Line Breadth on Salesperson Performance, Role Stress, and Job Satisfaction." Journal of the Academy of Marketing Science .
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Johnson, Jeff S. "The Curvilinear and Conditional Effects of Product Line Breadth on Salesperson Performance, Role Stress, and Job Satisfaction." Journal of the Academy of Marketing Science, .
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.