Không rõ. (1996). Introduction to the practice of Statistics. NOTNXB.
Chicago Style aipamenaKhông rõ. Introduction to the Practice of Statistics. NOTNXB, 1996.
MLA aipamenaKhông rõ. Introduction to the Practice of Statistics. NOTNXB, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.