Lua APA (7ú heag.)

Patricia Lauber. (1994). "Be a Friend to Trees (Let's-Read-and-Find-Out, Stage 2)" (Revised.). HarperCollins.

Lua i Stíl Chicago (17ú heag.)

Patricia Lauber. "Be a Friend to Trees (Let's-Read-and-Find-Out, Stage 2)". Revised. HarperCollins, 1994.

Lua MLA (9ú heag.)

Patricia Lauber. "Be a Friend to Trees (Let's-Read-and-Find-Out, Stage 2)". Revised. HarperCollins, 1994.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.