Não informado. (1967). MSU business topics. Michigan State University, Bureau of Business and Economic Research.
Citação do estilo Chicago (17ª ed.)Não informado. MSU Business Topics. East Lansing, Mich: Michigan State University, Bureau of Business and Economic Research, 1967.
Citação MLA (8ª ed.)Não informado. MSU Business Topics. Michigan State University, Bureau of Business and Economic Research, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.