Abbs, B., & Freebairn, I. Opening Strategies. Strategies 1. An integrated language course for beginners of English. Longman.
Cita Chicago Style (17a ed.)Abbs, Brian, y Ingrid Freebairn. Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Longman.
Cita MLA (9a ed.)Abbs, Brian, y Ingrid Freebairn. Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Longman.
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