González Martinez, N. A. (2004). A Syllabus and Methodological Procedure to Facilitate the Development of the Listening and Speakeng Skills in Learning of Basic English to Workers With Sixth to Ninth Grade academic Background at the University of El Salvador. El Salvador: UES FMO.

González Martinez, Nelson Astul. A Syllabus and Methodological Procedure to Facilitate the Development of the Listening and Speakeng Skills in Learning of Basic English to Workers With Sixth to Ninth Grade Academic Background At the University of El Salvador. El Salvador: UES FMO, 2004.

González Martinez, Nelson Astul. A Syllabus and Methodological Procedure to Facilitate the Development of the Listening and Speakeng Skills in Learning of Basic English to Workers With Sixth to Ninth Grade Academic Background At the University of El Salvador. El Salvador: UES FMO, 2004.