Chuo Kikuu cha Dar es Salaam. Economic Research Bureau, East African Agricultural Economics Society, & Helleiner, G. K. (1968). Agricultural planning in East Africa: Proceedings of a conference held at the University College, Dar es Salaam, April 1967. East African Pub. House.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Chuo Kikuu cha Dar es Salaam. Economic Research Bureau, East African Agricultural Economics Society, و Gerald K. Helleiner. Agricultural Planning in East Africa: Proceedings of a Conference Held at the University College, Dar Es Salaam, April 1967. [Nairobi]: East African Pub. House, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Chuo Kikuu cha Dar es Salaam. Economic Research Bureau, et al. Agricultural Planning in East Africa: Proceedings of a Conference Held at the University College, Dar Es Salaam, April 1967. East African Pub. House, 1968.