APA (7 वां संस्करण) प्रशस्ति पत्र
Ngefac, A. (2008). Social differentiation in Cameroon English: Evidence from sociolinguistic fieldwork. Peter Lang.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Ngefac, Aloysius. Social Differentiation in Cameroon English: Evidence from Sociolinguistic Fieldwork. New York: Peter Lang, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Ngefac, Aloysius. Social Differentiation in Cameroon English: Evidence from Sociolinguistic Fieldwork. Peter Lang, 2008.
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