Yerro, E. T. (1980). An analysis of the pronunciation errors made on English segmentals and some remedial measures to correct them [microform]. Photoduplication Service. University of the Philippines Library.
Citazione stile Chigago Style (17a edizione)Yerro, Eva Tanilong. An Analysis of the Pronunciation Errors Made on English Segmentals and Some Remedial Measures to Correct Them [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1980.
Citatione MLA (9a ed.)Yerro, Eva Tanilong. An Analysis of the Pronunciation Errors Made on English Segmentals and Some Remedial Measures to Correct Them [microform]. Photoduplication Service. University of the Philippines Library, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.