APA استشهاد

Hellwig, Z. (1953). Linear regression and its application to economics. Pergamon.

استشهاد بنمط شيكاغو

Hellwig, Zdzilaw. Linear Regression and Its Application to Economics. Oxford: Pergamon, 1953.

MLA استشهاد

Hellwig, Zdzilaw. Linear Regression and Its Application to Economics. Pergamon, 1953.