Παραπομπή APA

Riggleman, J. R. F. (1951). Business statistics (3.).

Παραπομπή Chicago Style

Riggleman, John R; Frisbee. Business Statistics. 3. McGraw-Hill book Co, Inc, NewYork, 1951.

Παραπομπή MLA

Riggleman, John R; Frisbee. Business Statistics. 3. 1951.