Lewis, J. P. (1959). Business conditions analysis. New York: McGraw-Hill.
Trích dẫn kiểu ChicagoLewis, John P. Business Conditions Analysis. New York: McGraw-Hill, 1959.
MLA CitationLewis, John P. Business Conditions Analysis. New York: McGraw-Hill, 1959.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.