Hughes, J. (2005). Business focus: Elementary (Teacher's book). Oxford: Oxford university press.
استشهاد بنمط شيكاغوHughes, John. Business Focus: Elementary (Teacher's Book). Oxford: Oxford university press, 2005.
MLA استشهادHughes, John. Business Focus: Elementary (Teacher's Book). Oxford: Oxford university press, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.