DACOSTA, S. STEP UP ! WITH GRAMMAR- 7. FRANK EDUCATIONAL AIDS.
Lua i Stíl Chicago (17ú heag.)DACOSTA, STEPHEN. STEP UP ! WITH GRAMMAR- 7. NEW DELHI: FRANK EDUCATIONAL AIDS.
Lua MLA (9ú heag.)DACOSTA, STEPHEN. STEP UP ! WITH GRAMMAR- 7. FRANK EDUCATIONAL AIDS.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.