APA (7 वां संस्करण) प्रशस्ति पत्र
Ayafor, M. (2015). The grammar problem in higher education in Cameroon: Assessing written standard english among undergraduates of the department of English at the University of Yaounde 1. Cambridge Scholars Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Ayafor, Miriam. The Grammar Problem in Higher Education in Cameroon: Assessing Written Standard English Among Undergraduates of the Department of English at the University of Yaounde 1. Newcastle upon Tyne, England: Cambridge Scholars Publishing, 2015.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Ayafor, Miriam. The Grammar Problem in Higher Education in Cameroon: Assessing Written Standard English Among Undergraduates of the Department of English at the University of Yaounde 1. Cambridge Scholars Publishing, 2015.
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