RAY MICHAEL. (1986). CREATIVITY IN BUSINESS. DOUBLEDAY.
Chicago Style aipamenaRAY MICHAEL. CREATIVITY IN BUSINESS. NEW YORK: DOUBLEDAY, 1986.
MLA aipamenaRAY MICHAEL. CREATIVITY IN BUSINESS. DOUBLEDAY, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.