APA
                    Jerry Fjermestad, Romano, . (2006). Electronic Customer Relationship Management. New Delhi: PHI.
                
                    Chicago
                    Jerry Fjermestad, Romano, . 2006. Electronic Customer Relationship Management. New Delhi: PHI.
                
                    Harvard
                    Jerry Fjermestad, Romano, . (2006). Electronic Customer Relationship Management. New Delhi: PHI.
                
                    MLA
                    Jerry Fjermestad, Romano, . Electronic Customer Relationship Management. New Delhi: PHI. 2006.