ENGEL, J. F. (1990). Consumer Behavior James F. Engel, Roger D Blackwell And Paul W. Miniard. The Dryden Press.
Lua i Stíl Chicago (17ú heag.)ENGEL, James F. Consumer Behavior James F. Engel, Roger D Blackwell And Paul W. Miniard. The Dryden Press, 1990.
Lua MLA (8ú heag.)ENGEL, James F. Consumer Behavior James F. Engel, Roger D Blackwell And Paul W. Miniard. The Dryden Press, 1990.
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