APA (7 वां संस्करण) प्रशस्ति पत्र
Njenga, G. (2011). Thriving on borrowed time: Reviving invesco assurance: case for reforming the insurance industry. Hope Centre International.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Njenga, Geoffrey. Thriving on Borrowed Time: Reviving Invesco Assurance: Case for Reforming the Insurance Industry. Nairobi: Hope Centre International, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Njenga, Geoffrey. Thriving on Borrowed Time: Reviving Invesco Assurance: Case for Reforming the Insurance Industry. Hope Centre International, 2011.
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