APA aipamena

Beals,Ralph E. (1972). Statistics for economists: An introduction. Rand McNally College publishing Co.

Chicago Style aipamena

Beals,Ralph E. Statistics for Economists: An Introduction. Chicago: Rand McNally College publishing Co, 1972.

MLA aipamena

Beals,Ralph E. Statistics for Economists: An Introduction. Rand McNally College publishing Co, 1972.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.