Association of Natural Rubber Producing Countries & Barlow, C. (1976). The progress and development of rubber smallholders: Proceedings of the first seminar held in Medan, Indonesia, 25-27 February 1975. Association of Natural Rubber Producing Countries.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Association of Natural Rubber Producing Countries và Colin Barlow. The Progress and Development of Rubber Smallholders: Proceedings of the First Seminar Held in Medan, Indonesia, 25-27 February 1975. Kuala Lumpur: Association of Natural Rubber Producing Countries, 1976.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Association of Natural Rubber Producing Countries và Colin Barlow. The Progress and Development of Rubber Smallholders: Proceedings of the First Seminar Held in Medan, Indonesia, 25-27 February 1975. Association of Natural Rubber Producing Countries, 1976.