Dyfyniad APA

(2010). Do one green thing: Saving the earth through simple, everyday choices / Mindy Pennybacker ; illustrations by Carolyn Vibbert ; foreword by Meryl Streep.

Dyfyniad Arddull Chicago

Do One Green Thing: Saving the Earth Through Simple, Everyday Choices / Mindy Pennybacker ; Illustrations by Carolyn Vibbert ; Foreword by Meryl Streep. 2010.

Dyfyniad MLA

Do One Green Thing: Saving the Earth Through Simple, Everyday Choices / Mindy Pennybacker ; Illustrations by Carolyn Vibbert ; Foreword by Meryl Streep. 2010.

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