Cotton, D. (2012). Market leader: Intermediate business English course book (New edition.). Hà Nội: Văn hóa thông tin.
Chicago ZitierstilCotton, David. Market Leader: Intermediate Business English Course Book. New edition. Hà Nội: Văn hóa thông tin, 2012.
MLA ZitierstilCotton, David. Market Leader: Intermediate Business English Course Book. New edition. Hà Nội: Văn hóa thông tin, 2012.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.