Παραπομπή APA

Beals, R. (1972). Statistics for economists, an introduction. Rand McNally.

Παραπομπή Chicago Style

Beals, Ralphe. Statistics for Economists, an Introduction. Chicago: Rand McNally, 1972.

Παραπομπή MLA

Beals, Ralphe. Statistics for Economists, an Introduction. Rand McNally, 1972.