APA (7 वां संस्करण) प्रशस्ति पत्र
Torres Cacoullos, R. (2000). Grammaticization, synchronic variation, and language contact: A study of Spanish progressive -ndo constructions. J. Benjamins.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Torres Cacoullos, Rena. Grammaticization, Synchronic Variation, and Language Contact: A Study of Spanish Progressive -ndo Constructions. Amsterdam ; Philadelphia: J. Benjamins, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Torres Cacoullos, Rena. Grammaticization, Synchronic Variation, and Language Contact: A Study of Spanish Progressive -ndo Constructions. J. Benjamins, 2000.
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