Barker, L. (2007). Business skills exercises. Australia: Thomson South-Western.
استشهاد بنمط شيكاغوBarker, Loretta. Business Skills Exercises. Australia: Thomson South-Western, 2007.
MLA استشهادBarker, Loretta. Business Skills Exercises. Australia: Thomson South-Western, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.