Dyfyniad APA

BEILBY M H. (1975). ECONOMICS AND OPRATIONAL RESEARCH. PITMAN PUBLICATIONS.

Dyfyniad Arddull Chicago

BEILBY M H. ECONOMICS AND OPRATIONAL RESEARCH. LONDON: PITMAN PUBLICATIONS, 1975.

Dyfyniad MLA

BEILBY M H. ECONOMICS AND OPRATIONAL RESEARCH. PITMAN PUBLICATIONS, 1975.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.