1. Categorical Data Analysis;Agresti,1990
2. Estimating Nonresponse Bias in Mail Surveys;Armstrong;Journal of Marketing Research,1977
3. A Comparison between Port-of-Entry Visitor Center Users and Nonusers;Cadez,1978
4. Concepts, Definitions, and Measures Used in Travel and Tourism Research;Chadwick,1987
5. Marketing Research: Methodological Foundations;Churchill,1995