CHAINES, M. H. (1980). Developing oral english skills: Spectrum of engliish 1. Glenchoe Publishing.
Lua i Stíl Chicago (17ú heag.)CHAINES, Mary H. Developing Oral English Skills: Spectrum of Engliish 1. Enchino: Glenchoe Publishing, 1980.
Lua MLA (9ú heag.)CHAINES, Mary H. Developing Oral English Skills: Spectrum of Engliish 1. Glenchoe Publishing, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.