(2009). Harvard business review on managing external risk. Harvard Business School Publishing Coporation.
استشهاد بنمط شيكاغوHarvard Business Review On Managing External Risk. Harvard Business School Publishing Coporation, 2009.
MLA استشهادHarvard Business Review On Managing External Risk. Harvard Business School Publishing Coporation, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.