Pires, M. C. (1950). Portuguese as it is spoken. Livraria Clássica Editora.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPires, Mário C. Portuguese as It Is Spoken. Livraria Clássica Editora, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPires, Mário C. Portuguese as It Is Spoken. Livraria Clássica Editora, 1950.
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