Boyd, H. W., & Westfall, R. L. (1960). Evaluation of continuous consumer panels as a source of marketing information. American Marketing Association.
Lua i Stíl Chicago (17ú heag.)Boyd, Harper W., agus Ralph L. Westfall. Evaluation of Continuous Consumer Panels as a Source of Marketing Information. [Chicago]: American Marketing Association, 1960.
Lua MLA (9ú heag.)Boyd, Harper W., agus Ralph L. Westfall. Evaluation of Continuous Consumer Panels as a Source of Marketing Information. American Marketing Association, 1960.
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