Cita APA

Siebert, A., & Siebert, A. (2009). Going green: What you can do to save planet earth (1. edition.). Brattleboro, Vt.: Pro Lingua Associates.

Citación estilo Chicago

Siebert, Anne, y Anne Siebert. Going Green: What You Can Do to Save Planet Earth. 1. edition. Brattleboro, Vt.: Pro Lingua Associates, 2009.

Cita MLA

Siebert, Anne, y Anne Siebert. Going Green: What You Can Do to Save Planet Earth. 1. edition. Brattleboro, Vt.: Pro Lingua Associates, 2009.