de Felippe, A. C. N., Grillo, M. H. M. M., & Grechi, T. H. (2006). Standardization of acoustic measures for normal voice patterns. Brazilian journal of otorhinolaryngology, 72(5), 659-664. https://doi.org/10.1016/S1808-8694(15)31023-5
Chicago Style (17th ed.) Citationde Felippe, Ana Clara Naufel, Maria Helena Marotti Martelletti Grillo, and Thaís Helena Grechi. "Standardization of Acoustic Measures for Normal Voice Patterns." Brazilian Journal of Otorhinolaryngology 72, no. 5 (2006): 659-664. https://doi.org/10.1016/S1808-8694(15)31023-5.
MLA (9th ed.) Citationde Felippe, Ana Clara Naufel, et al. "Standardization of Acoustic Measures for Normal Voice Patterns." Brazilian Journal of Otorhinolaryngology, vol. 72, no. 5, 2006, pp. 659-664, https://doi.org/10.1016/S1808-8694(15)31023-5.