APA
Allen B., . (1974). English for the commerce student. J M Dent & Sons, London: .
Chicago
Allen Bryan, . 1974. English for the commerce student. J M Dent & Sons, London: .
Harvard
Allen B., . (1974). English for the commerce student. J M Dent & Sons, London: .
MLA
Allen Bryan, . English for the commerce student. J M Dent & Sons, London: . 1974.