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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)PWPA Eastern African Regional Conference Nairobi, Kenya, Professors World Peace Academy of Kenya, Paul Pius Waw Achola, Kenneth R. Gray, و 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.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)PWPA 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.