APA (7 वां संस्करण) प्रशस्ति पत्र
Gathumbi, A., Bwonya, J., Kiio, N., Mugambi, H., & Newman, J. (1988). New integrated English: A course for Kenya secondary schools students book two. Jomo Kenyatta Foundation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Gathumbi, Agnes, Jane Bwonya, Ngungui Kiio, Harriet Mugambi, और Julie Newman. New Integrated English: A Course for Kenya Secondary Schools Students Book Two. Nairobi: Jomo Kenyatta Foundation, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Gathumbi, Agnes, et al. New Integrated English: A Course for Kenya Secondary Schools Students Book Two. Jomo Kenyatta Foundation, 1988.
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