Harder, T. (1969). Introduction to mathematicals models in market and opinion research.
Chicago Style (17th ed.) CitationHarder, Theodor. Introduction to Mathematicals Models in Market and Opinion Research. 1969.
MLA (9th ed.) CitationHarder, Theodor. Introduction to Mathematicals Models in Market and Opinion Research. 1969.
Warning: These citations may not always be 100% accurate.