APA (7th ed.) Citation

Harder, T. (1969). Introduction to mathematical models in market and opinion research with practical procedures, and estimates of computing requirements. D. Reidel Publishing.

Chicago Style (17th ed.) Citation

Harder, Theodor. Introduction to Mathematical Models in Market and Opinion Research with Practical Procedures, and Estimates of Computing Requirements. Holland: D. Reidel Publishing, 1969.

MLA (9th ed.) Citation

Harder, Theodor. Introduction to Mathematical Models in Market and Opinion Research with Practical Procedures, and Estimates of Computing Requirements. D. Reidel Publishing, 1969.