Dyfyniad APA

Ries Al. (2017). Positioning: The Battle For Your Mind (20.). McGraw Hill Education.

Dyfyniad Arddull Chicago

Ries Al. Positioning: The Battle For Your Mind. 20. Chennai: McGraw Hill Education, 2017.

Dyfyniad MLA

Ries Al. Positioning: The Battle For Your Mind. 20. McGraw Hill Education, 2017.

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