Black, K. (2004). Business Statistics (4th.). John Wiley & Sons.
Chicago Style aipamenaBlack, Ken. Business Statistics. 4th. John Wiley & Sons, 2004.
MLA aipamenaBlack, Ken. Business Statistics. 4th. John Wiley & Sons, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.