Escalante Araúz, P. (1991). The acquisition of twenty grammatical structures in children learning english as a foreign language in a Costa Rican bilingual elementary school. Escuela de Lenguas Modernas, Universidad de Costa Rica.
Cita Chicago Style (17a ed.)Escalante Araúz, Patricia. The Acquisition of Twenty Grammatical Structures in Children Learning English as a Foreign Language in a Costa Rican Bilingual Elementary School. San José, Costa Rica: Escuela de Lenguas Modernas, Universidad de Costa Rica, 1991.
Cita MLA (9a ed.)Escalante Araúz, Patricia. The Acquisition of Twenty Grammatical Structures in Children Learning English as a Foreign Language in a Costa Rican Bilingual Elementary School. Escuela de Lenguas Modernas, Universidad de Costa Rica, 1991.