Cita APA (7th ed.)

Beals, R. E. (1972). Statistics for economists: An introduction. Rand McNally.

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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