APA aipamena

Ruff, H. J. (1979). How to prosper during the coming bad years. Times Books.

Chicago Style aipamena

Ruff, Howard J. How to Prosper During the Coming Bad Years. New York: Times Books, 1979.

MLA aipamena

Ruff, Howard J. How to Prosper During the Coming Bad Years. Times Books, 1979.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.