Rivera Astudillo, S., & Salinas Quevedo, G. Grammar teaching to improve the writing skill.
Lua i Stíl Chicago (17ú heag.)Rivera Astudillo, Santiago, agus Guillermo Salinas Quevedo. Grammar Teaching to Improve the Writing Skill.
Lua MLA (8ú heag.)Rivera Astudillo, Santiago, agus Guillermo Salinas Quevedo. Grammar Teaching to Improve the Writing Skill.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.