Dyfyniad APA

Tony, P. (2025). Essentials of Marketing Research ( 4th Edition ). British Library Cataloguing-in-Publication Data.

Dyfyniad Arddull Chicago

Tony, Proctor. Essentials of Marketing Research ( 4th Edition ). British Library Cataloguing-in-Publication Data, 2025.

Dyfyniad MLA

Tony, Proctor. Essentials of Marketing Research ( 4th Edition ). British Library Cataloguing-in-Publication Data, 2025.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.