(2010). Do one green thing: Saving the earth through simple, everyday choices / Mindy Pennybacker ; illustrations by Carolyn Vibbert ; foreword by Meryl Streep.
Chicago-referens (17:e uppl.)Do One Green Thing: Saving the Earth Through Simple, Everyday Choices / Mindy Pennybacker ; Illustrations by Carolyn Vibbert ; Foreword by Meryl Streep. 2010.
MLA-referens (9:e uppl.)Do One Green Thing: Saving the Earth Through Simple, Everyday Choices / Mindy Pennybacker ; Illustrations by Carolyn Vibbert ; Foreword by Meryl Streep. 2010.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.