KONRED, E. (1966). Markeitng Research: A Management Overview. Taraporevala Sons.
Lua i Stíl Chicago (17ú heag.)KONRED, Evelyn. Markeitng Research: A Management Overview. Taraporevala Sons, 1966.
Lua MLA (8ú heag.)KONRED, Evelyn. Markeitng Research: A Management Overview. Taraporevala Sons, 1966.
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