Walthall, W. A. (1979). Getting into business/2e (2nd ed.). Harper & Row.
Chicago Style aipamenaWalthall, Wylie A. Getting into Business/2e. 2nd ed. London: Harper & Row, 1979.
MLA aipamenaWalthall, Wylie A. Getting into Business/2e. 2nd ed. Harper & Row, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.