National Research Council of Thailand. 1992. Proceedings of International seminar on agricultural change and development in Southeast Asia. Bangkok:NRCT;
National Research Council of Thailand. (1992) Proceedings of International seminar on agricultural change and development in Southeast Asia (รายงานผลงานวิจัย). NRCT:Bangkok.
National Research Council of Thailand. Proceedings of International seminar on agricultural change and development in Southeast Asia. Bangkok:NRCT, 1992.
National Research Council of Thailand. (1992) Proceedings of International seminar on agricultural change and development in Southeast Asia (รายงานผลงานวิจัย). NRCT:Bangkok.