APA
Barker D. E. &. F. B., . (196). The basic arts of buying. Business Books Ltd., London: .
Chicago
Barker D E & Farrington B, . 196. The basic arts of buying. Business Books Ltd., London: .
Harvard
Barker D. E. &. F. B., . (196). The basic arts of buying. Business Books Ltd., London: .
MLA
Barker D E & Farrington B, . The basic arts of buying. Business Books Ltd., London: . 196.