Wright, S. M. (1972). Teaching the number system to intermediate educable mentally retarded pupils through the use of variety of methods.
Lua i Stíl Chicago (17ú heag.)Wright, Scott Mathews. Teaching the Number System to Intermediate Educable Mentally Retarded Pupils Through the Use of Variety of Methods. 1972.
Lua MLA (9ú heag.)Wright, Scott Mathews. Teaching the Number System to Intermediate Educable Mentally Retarded Pupils Through the Use of Variety of Methods. 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.