Lua APA (7ú heag.)

BALLARD, C. (2001). HOW DO WE THINK (1st.). HODDER CHILDREN'S BOOKS.

Lua i Stíl Chicago (17ú heag.)

BALLARD, CAROL. HOW DO WE THINK. 1st. LONDON: HODDER CHILDREN'S BOOKS, 2001.

Lua MLA (9ú heag.)

BALLARD, CAROL. HOW DO WE THINK. 1st. HODDER CHILDREN'S BOOKS, 2001.

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