APA
Ende F., . (1984). Small business programs for the IBM PC. Germany: GMBH.
Chicago
Ende F, . 1984. Small business programs for the IBM PC. Germany: GMBH.
Harvard
Ende F., . (1984). Small business programs for the IBM PC. Germany: GMBH.
MLA
Ende F, . Small business programs for the IBM PC. Germany: GMBH. 1984.