APA
                    Bengt Karlof, Svante Ostblom, . (1993). Benchmarking: A Signpost Excellence in quality and Productivity. New York: Wiley.
                
                    Chicago
                    Bengt Karlof, Svante Ostblom, . 1993. Benchmarking: A Signpost Excellence in quality and Productivity. New York: Wiley.
                
                    Harvard
                    Bengt Karlof, Svante Ostblom, . (1993). Benchmarking: A Signpost Excellence in quality and Productivity. New York: Wiley.
                
                    MLA
                    Bengt Karlof, Svante Ostblom, . Benchmarking: A Signpost Excellence in quality and Productivity. New York: Wiley. 1993.