Wentz, W. B. (1972). Marketing research: Management and methods. Happer & Row.
Chicago-стиль цитированияWentz, Walter B. Marketing Research: Management and Methods. New York: Happer & Row, 1972.
MLA-цитированиеWentz, Walter B. Marketing Research: Management and Methods. Happer & Row, 1972.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.