Heller, R. New trends in biology teaching.
Lua i Stíl Chicago (17ú heag.)Heller, R. New Trends in Biology Teaching.
Lua MLA (9ú heag.)Heller, R. New Trends in Biology Teaching.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.