Rionda, C. S. A. (1975). Analysis of errors in English predication structures in the written work of the Grade V and VI pupils of Francisco Benitez Elementary School, Manila [microform]. Photoduplication Service,University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Rionda, Carolina San Agustin. Analysis of Errors in English Predication Structures in the Written Work of the Grade V and VI Pupils of Francisco Benitez Elementary School, Manila [microform]. Quezon City: Photoduplication Service,University of the Philippines Library, 1975.
Lua MLA (9ú heag.)Rionda, Carolina San Agustin. Analysis of Errors in English Predication Structures in the Written Work of the Grade V and VI Pupils of Francisco Benitez Elementary School, Manila [microform]. Photoduplication Service,University of the Philippines Library, 1975.