Operations Research Society of America. (1981). Operations Research Letters. North Holland Publishing.
Citação do estilo Chicago (17ª ed.)Operations Research Society of America. Operations Research Letters. Amsterdam: North Holland Publishing, 1981.
Citação MLA (8ª ed.)Operations Research Society of America. Operations Research Letters. North Holland Publishing, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.