Dubicka, I., & O'Keeffe, M. (2015). Market Leader: Advanced: Business English Course Book. PearsonLongman.
استشهاد بنمط شيكاغوDubicka, Iwonna, و Margaret O'Keeffe. Market Leader: Advanced: Business English Course Book. PearsonLongman, 2015.
MLA استشهادDubicka, Iwonna, و Margaret O'Keeffe. Market Leader: Advanced: Business English Course Book. PearsonLongman, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.