Murray, W., & Aitchison, M. (1978). Our friends. Ladybird Books.
Lua i Stíl Chicago (17ú heag.)Murray, William, agus Martin Aitchison. Our Friends. Loughborough [England]: Ladybird Books, 1978.
Lua MLA (9ú heag.)Murray, William, agus Martin Aitchison. Our Friends. Ladybird Books, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.