Hutchinson, T. (1997). Life Lines: Pre-Intermediate student's book (1a. ed. 9. reimp.). OffordUniversity Press.
Lua i Stíl Chicago (17ú heag.)Hutchinson, Tom. Life Lines: Pre-Intermediate Student's Book. 1a. ed. 9. reimp. Estados Unidos: OffordUniversity Press, 1997.
Lua MLA (9ú heag.)Hutchinson, Tom. Life Lines: Pre-Intermediate Student's Book. 1a. ed. 9. reimp. OffordUniversity Press, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.