PWPA Eastern African Regional Conference Nairobi, Kenya, Professors World Peace Academy of Kenya, Achola, P. P. W., Gray, K. R., & Kerre, B. W. (1990). Trends & the future of university education in Kenya: Proceedings of the 6th PWPA Conference, Eastern Region, held in Nairobi, Kenya, December, 1989. Professors World Peace Academy of Kenya.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPWPA Eastern African Regional Conference Nairobi, Kenya, Professors World Peace Academy of Kenya, Paul Pius Waw Achola, Kenneth R. Gray, और B. Wanjala Kerre. Trends & the Future of University Education in Kenya: Proceedings of the 6th PWPA Conference, Eastern Region, Held in Nairobi, Kenya, December, 1989. Nairobi, Kenya: Professors World Peace Academy of Kenya, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPWPA Eastern African Regional Conference Nairobi, Kenya, et al. Trends & the Future of University Education in Kenya: Proceedings of the 6th PWPA Conference, Eastern Region, Held in Nairobi, Kenya, December, 1989. Professors World Peace Academy of Kenya, 1990.