Dyfyniad APA

RIES AL. (1990). BOTTOM-UP MARKETING. PLUME BOOK.

Dyfyniad Arddull Chicago

RIES AL. BOTTOM-UP MARKETING. NEW YORK: PLUME BOOK, 1990.

Dyfyniad MLA

RIES AL. BOTTOM-UP MARKETING. PLUME BOOK, 1990.

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