DonaldT. Campbell, and StanleyJulian, “Experimental and Quasi-experimental Designs for Research on Teaching,” in GageN. L., ed., Handbook on Research on Teaching, Chicago: Rand McNally & Co., 1963, Chapter 5.
2.
DavidT. Kollat, and WillettRonald P., “Customer Impulse Purchasing Behavior,”Journal of Marketing Research, 4 (February 1967), 21–31.
3.
DavidT. Kollat, “Impulse Purchasing as a Special Case of Customer Decision Making,” in George SmithL., ed., Reflections on Progress in Marketing, Chicago: American Marketing Association, 1965
