BLACK, K. (2013). APPLIED BUSINESS STATISTICS. WILEY INDIA.
Chicago Style aipamenaBLACK, KEN. APPLIED BUSINESS STATISTICS. DELHI: WILEY INDIA, 2013.
MLA aipamenaBLACK, KEN. APPLIED BUSINESS STATISTICS. WILEY INDIA, 2013.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.