«Canto Coral Infantil». Canto Coral Infantil (em inglês). Consultado em 19 de fevereiro de 2018
doi.org
dx.doi.org
Moller, Herbert (1985). «Voice Change in Human Biological Development». The MIT Press. Journal of Interdisciplinary History. 16 (2): 239–253. JSTOR204176. PMID11617364. doi:10.2307/204176
jstor.org
Moller, Herbert (1985). «Voice Change in Human Biological Development». The MIT Press. Journal of Interdisciplinary History. 16 (2): 239–253. JSTOR204176. PMID11617364. doi:10.2307/204176
nih.gov
ncbi.nlm.nih.gov
Moller, Herbert (1985). «Voice Change in Human Biological Development». The MIT Press. Journal of Interdisciplinary History. 16 (2): 239–253. JSTOR204176. PMID11617364. doi:10.2307/204176